{
  "$schema": "https://open.divekit.app/schemas/cylinders/cylinders.schema.v1.0.0.json",
  "meta": {
    "version": "2026.06.10.1",
    "generated_at": "2026-06-10T12:00:00Z"
  },
  "cylinders": [
    {
      "id": "al80",
      "commonName": "AL80",
      "waterVolumeL": 11.1,
      "workingPressureBar": 207,
      "material": "aluminum",
      "typicalUse": "Recreational single tank (warm water, training, sidemount)",
      "emptyWeightKg": 14.2,
      "buoyancyKg": {
        "full": -1.0,
        "at50bar": 1.1,
        "empty": 1.8
      },
      "brands": [
        "Luxfer",
        "Catalina",
        "Thunderbird"
      ],
      "notes": "Standard rental tank globally; becomes positively buoyant near end of dive.",
      "ratedCapacityCuft": 80
    },
    {
      "id": "al12-200",
      "commonName": "AL 12L",
      "waterVolumeL": 12.0,
      "workingPressureBar": 200,
      "material": "aluminum",
      "typicalUse": "Recreational single tank (Asia, some EU regions)",
      "emptyWeightKg": 16.5,
      "buoyancyKg": {
        "full": -0.4,
        "at50bar": 1.8,
        "empty": 2.5
      },
      "brands": [
        "Various Asian manufacturers",
        "Some EU brands"
      ],
      "notes": "Common in Asian dive markets; larger and heavier than AL80."
    },
    {
      "id": "al72",
      "commonName": "AL72",
      "waterVolumeL": 10.0,
      "workingPressureBar": 207,
      "material": "aluminum",
      "typicalUse": "Recreational single tank (smaller divers, shorter dives)",
      "emptyWeightKg": 13.0,
      "buoyancyKg": {
        "full": -1.0,
        "at50bar": 0.9,
        "empty": 1.5
      },
      "brands": [
        "Luxfer",
        "Catalina"
      ],
      "notes": "Good option between AL63 and AL80; popular for travel and sidemount.",
      "ratedCapacityCuft": 72
    },
    {
      "id": "al63",
      "commonName": "AL63",
      "waterVolumeL": 9.0,
      "workingPressureBar": 207,
      "material": "aluminum",
      "typicalUse": "Small divers, short recreational dives",
      "emptyWeightKg": 11.3,
      "buoyancyKg": {
        "full": -1.2,
        "at50bar": 0.5,
        "empty": 1.0
      },
      "brands": [
        "Luxfer",
        "Catalina",
        "Thunderbird"
      ],
      "notes": "Popular with small-frame divers or kids; lighter but same diameter as AL80.",
      "ratedCapacityCuft": 63
    },
    {
      "id": "al50",
      "commonName": "AL50",
      "waterVolumeL": 6.9,
      "workingPressureBar": 207,
      "material": "aluminum",
      "typicalUse": "Stage / deco for light gas",
      "emptyWeightKg": 9.0,
      "buoyancyKg": {
        "full": -0.9,
        "at50bar": 0.4,
        "empty": 0.8
      },
      "brands": [
        "Luxfer",
        "Catalina",
        "Thunderbird"
      ],
      "notes": "Compact stage/deco bottle; manageable for warm-water tech dives.",
      "ratedCapacityCuft": 50
    },
    {
      "id": "al40",
      "commonName": "AL40",
      "waterVolumeL": 5.7,
      "workingPressureBar": 207,
      "material": "aluminum",
      "typicalUse": "Stage / deco / O₂ bottle",
      "emptyWeightKg": 6.0,
      "buoyancyKg": {
        "full": -0.7,
        "at50bar": 0.4,
        "empty": 0.7
      },
      "brands": [
        "Luxfer",
        "Catalina",
        "Thunderbird"
      ],
      "notes": "Common oxygen bottle for deco; good trim when clipped to left side.",
      "ratedCapacityCuft": 40
    },
    {
      "id": "al30",
      "commonName": "AL30",
      "waterVolumeL": 4.3,
      "workingPressureBar": 207,
      "material": "aluminum",
      "typicalUse": "Pony / emergency",
      "emptyWeightKg": 4.9,
      "buoyancyKg": {
        "full": -0.8,
        "at50bar": 0.0,
        "empty": 0.3
      },
      "brands": [
        "Luxfer",
        "Catalina",
        "Thunderbird"
      ],
      "notes": "Pony bottle for emergency gas; small enough for travel or boat use.",
      "ratedCapacityCuft": 30
    },
    {
      "id": "al19",
      "commonName": "AL19",
      "waterVolumeL": 2.87,
      "workingPressureBar": 207,
      "material": "aluminum",
      "typicalUse": "Pony / bailout",
      "emptyWeightKg": 3.6,
      "buoyancyKg": {
        "full": -0.8,
        "at50bar": -0.3,
        "empty": -0.1
      },
      "brands": [
        "Luxfer",
        "Catalina",
        "Thunderbird"
      ],
      "notes": "Very small bailout bottle; slightly negative when empty. Water volume is Luxfer's true LAL19 figure (2.87 L), so its real-gas free gas reads a touch over the marketed 19.",
      "ratedCapacityCuft": 19
    },
    {
      "id": "al13",
      "commonName": "AL13",
      "waterVolumeL": 1.9,
      "workingPressureBar": 207,
      "material": "aluminum",
      "typicalUse": "Argon inflation / bailout",
      "emptyWeightKg": 2.7,
      "buoyancyKg": {
        "full": -0.6,
        "at50bar": -0.2,
        "empty": -0.1
      },
      "brands": [
        "Luxfer",
        "Catalina",
        "Thunderbird"
      ],
      "notes": "Usually mounted for drysuit argon inflation; rarely used for breathing gas.",
      "ratedCapacityCuft": 13
    },
    {
      "id": "steel12-232",
      "commonName": "Steel 12L 232",
      "waterVolumeL": 12.0,
      "workingPressureBar": 232,
      "material": "steel",
      "typicalUse": "Single tank EU cold water",
      "emptyWeightKg": 14.5,
      "buoyancyKg": {
        "full": -3.8,
        "at50bar": -1.3,
        "empty": -0.5
      },
      "brands": [
        "Faber",
        "Eurocylinders"
      ],
      "notes": "Most common steel tank in Europe; stays negative."
    },
    {
      "id": "steel12-300",
      "commonName": "Steel 12L 300",
      "waterVolumeL": 12.0,
      "workingPressureBar": 300,
      "material": "steel",
      "typicalUse": "Compact high-pressure single",
      "emptyWeightKg": 17.0,
      "buoyancyKg": {
        "full": -5.5,
        "at50bar": -2.2,
        "empty": -1.5
      },
      "brands": [
        "Faber",
        "Eurocylinders"
      ],
      "notes": "Very dense; allows more gas but heavier topside and affects trim."
    },
    {
      "id": "steel15-232",
      "commonName": "Steel 15L 232",
      "waterVolumeL": 15.0,
      "workingPressureBar": 232,
      "material": "steel",
      "typicalUse": "Cold/long dives",
      "emptyWeightKg": 17.5,
      "buoyancyKg": {
        "full": -4.2,
        "at50bar": -1.0,
        "empty": 0.0
      },
      "brands": [
        "Faber",
        "Eurocylinders"
      ],
      "notes": "Heavy but long bottom time; usually neutral when empty."
    },
    {
      "id": "steel10-232",
      "commonName": "Steel 10L 232",
      "waterVolumeL": 10.0,
      "workingPressureBar": 232,
      "material": "steel",
      "typicalUse": "Small divers / twinset",
      "emptyWeightKg": 12.5,
      "buoyancyKg": {
        "full": -3.4,
        "at50bar": -1.3,
        "empty": -0.6
      },
      "brands": [
        "Faber"
      ],
      "notes": "Often used as twin 10s for balanced doubles in cold water."
    },
    {
      "id": "steel10_5-232",
      "commonName": "Steel 10.5L 232",
      "waterVolumeL": 10.5,
      "workingPressureBar": 232,
      "material": "steel",
      "typicalUse": "Small divers / twinset",
      "emptyWeightKg": 13.0,
      "buoyancyKg": {
        "full": -3.8,
        "at50bar": -1.5,
        "empty": -0.8
      },
      "brands": [
        "Faber",
        "Eurocylinders"
      ],
      "notes": "Popular compact steel; often used as twin 10.5s in Europe."
    },
    {
      "id": "steel7-232",
      "commonName": "Steel 7L 232",
      "waterVolumeL": 7.0,
      "workingPressureBar": 232,
      "material": "steel",
      "typicalUse": "Deco/stage EU",
      "emptyWeightKg": 9.2,
      "buoyancyKg": {
        "full": -2.8,
        "at50bar": -1.3,
        "empty": -0.8
      },
      "brands": [
        "Faber"
      ],
      "notes": "Stage/deco bottle for cold water; remains negative throughout."
    },
    {
      "id": "steel3-300",
      "commonName": "Steel 3L 300",
      "waterVolumeL": 3.0,
      "workingPressureBar": 300,
      "material": "steel",
      "typicalUse": "CCR oxygen / diluent",
      "emptyWeightKg": 4.5,
      "buoyancyKg": {
        "full": -1.9,
        "at50bar": -1.0,
        "empty": -0.8
      },
      "brands": [
        "Faber",
        "Eurocylinders"
      ],
      "notes": "Standard 3L rebreather bottle; fits most CCR frames."
    },
    {
      "id": "lp85",
      "commonName": "LP85",
      "waterVolumeL": 13.0,
      "workingPressureBar": 182,
      "material": "steel",
      "typicalUse": "Tech singles / doubles US",
      "emptyWeightKg": 14.0,
      "buoyancyKg": {
        "full": -1.9,
        "at50bar": 0.4,
        "empty": 1.1
      },
      "brands": [
        "Worthington",
        "PST"
      ],
      "notes": "Popular cave/wreck tank; becomes positive if not overfilled.",
      "ratedCapacityCuft": 85
    },
    {
      "id": "lp95",
      "commonName": "LP95",
      "waterVolumeL": 15.0,
      "workingPressureBar": 182,
      "material": "steel",
      "typicalUse": "Tech doubles US",
      "emptyWeightKg": 17.0,
      "buoyancyKg": {
        "full": -3.6,
        "at50bar": -1.0,
        "empty": -0.2
      },
      "brands": [
        "Worthington",
        "PST"
      ],
      "notes": "Cave/wreck doubles workhorse; roughly neutral when empty.",
      "ratedCapacityCuft": 95
    },
    {
      "id": "hp100",
      "commonName": "HP100",
      "waterVolumeL": 12.9,
      "workingPressureBar": 237,
      "material": "steel",
      "typicalUse": "Popular US cold-water single",
      "emptyWeightKg": 15.2,
      "buoyancyKg": {
        "full": -3.8,
        "at50bar": -1.0,
        "empty": -0.3
      },
      "brands": [
        "Faber"
      ],
      "notes": "Good trim and buoyancy; favorite single for drysuit divers. The 12.9 L water volume and buoyancy are the Faber FX100 (full -8.41 lb, empty -0.59 lb, in sea water with valve); the Worthington/PST X7-100 is a different cylinder (~11.6 L).",
      "ratedCapacityCuft": 100
    },
    {
      "id": "hp120",
      "commonName": "HP120",
      "waterVolumeL": 15.3,
      "workingPressureBar": 237,
      "material": "steel",
      "typicalUse": "Long US single dives",
      "emptyWeightKg": 18.0,
      "buoyancyKg": {
        "full": -5.5,
        "at50bar": -2.0,
        "empty": -1.1
      },
      "brands": [
        "Worthington",
        "PST"
      ],
      "notes": "Tall and heavy; lots of gas for single-tank tech or long rec dives.",
      "ratedCapacityCuft": 120
    },
    {
      "id": "hp117",
      "commonName": "HP117",
      "waterVolumeL": 15.0,
      "workingPressureBar": 237,
      "material": "steel",
      "typicalUse": "Tech singles / doubles US",
      "emptyWeightKg": 17.5,
      "buoyancyKg": {
        "full": -5.0,
        "at50bar": -1.9,
        "empty": -1.0
      },
      "brands": [
        "Faber"
      ],
      "notes": "Popular tech diving cylinder; good balance of capacity and trim.",
      "ratedCapacityCuft": 117
    },
    {
      "id": "hp130",
      "commonName": "HP130",
      "waterVolumeL": 16.0,
      "workingPressureBar": 237,
      "material": "steel",
      "typicalUse": "Very long cold dives",
      "emptyWeightKg": 20.0,
      "buoyancyKg": {
        "full": -5.8,
        "at50bar": -2.2,
        "empty": -1.0
      },
      "brands": [
        "Worthington"
      ],
      "notes": "Gas monster; heavy and long, often awkward for smaller divers.",
      "ratedCapacityCuft": 130
    },
    {
      "id": "hp133",
      "commonName": "HP133",
      "waterVolumeL": 17.0,
      "workingPressureBar": 237,
      "material": "steel",
      "ratedCapacityCuft": 133,
      "typicalUse": "Very long cold/deep single dives",
      "emptyWeightKg": 21.0,
      "buoyancyKg": {
        "full": -4.1,
        "at50bar": -0.3,
        "empty": 0.7
      },
      "brands": [
        "Faber"
      ],
      "notes": "Faber's largest single (sometimes called a 130). Heavy, but floats slightly when empty. Buoyancy from the Faber FX133 sheet (full -9.08 lb, empty +1.45 lb, in sea water with valve)."
    },
    {
      "id": "ccr2l",
      "commonName": "CCR 2L",
      "waterVolumeL": 2.0,
      "workingPressureBar": 200,
      "material": "steel",
      "typicalUse": "CCR oxygen",
      "emptyWeightKg": 3.0,
      "buoyancyKg": {
        "full": -0.9,
        "at50bar": -0.5,
        "empty": -0.4
      },
      "brands": [
        "Faber"
      ],
      "notes": "Compact CCR O₂ bottle; easy to travel with and replace."
    },
    {
      "id": "ccr3l",
      "commonName": "CCR 3L",
      "waterVolumeL": 3.0,
      "workingPressureBar": 200,
      "material": "steel",
      "typicalUse": "CCR diluent",
      "emptyWeightKg": 4.5,
      "buoyancyKg": {
        "full": -1.9,
        "at50bar": -1.0,
        "empty": -0.8
      },
      "brands": [
        "Faber"
      ],
      "notes": "Standard diluent cylinder for most CCR units; often filled to 232 bar."
    },
    {
      "id": "al100",
      "commonName": "AL100",
      "waterVolumeL": 13.2,
      "workingPressureBar": 228,
      "material": "aluminum",
      "typicalUse": "Longer rec single / big gas in warm water",
      "emptyWeightKg": 16.0,
      "buoyancyKg": {
        "full": -2.2,
        "at50bar": 0.8,
        "empty": 1.6
      },
      "brands": [
        "Luxfer",
        "Catalina",
        "Thunderbird"
      ],
      "notes": "High-capacity aluminum; tall and heavy.",
      "ratedCapacityCuft": 100
    },
    {
      "id": "hp80",
      "commonName": "HP80",
      "waterVolumeL": 10.2,
      "workingPressureBar": 237,
      "material": "steel",
      "typicalUse": "Short/shallower cold-water single or doubles",
      "emptyWeightKg": 12.0,
      "buoyancyKg": {
        "full": -3.6,
        "at50bar": -1.6,
        "empty": -0.9
      },
      "brands": [
        "Worthington",
        "PST"
      ],
      "notes": "Compact steel; remains negative when empty.",
      "ratedCapacityCuft": 80
    },
    {
      "id": "hp119",
      "commonName": "HP119",
      "waterVolumeL": 14.8,
      "workingPressureBar": 237,
      "material": "steel",
      "typicalUse": "Long cold-water single / big-gas doubles",
      "emptyWeightKg": 18.6,
      "buoyancyKg": {
        "full": -4.8,
        "at50bar": -1.7,
        "empty": -0.7
      },
      "brands": [
        "Worthington",
        "PST"
      ],
      "notes": "High-capacity HP steel; stays negative.",
      "ratedCapacityCuft": 119
    },
    {
      "id": "lp50",
      "commonName": "LP50",
      "waterVolumeL": 7.8,
      "workingPressureBar": 182,
      "material": "steel",
      "typicalUse": "Doubles/sidemount small-frame divers, cave/wreck",
      "emptyWeightKg": 8.5,
      "buoyancyKg": {
        "full": -2.0,
        "at50bar": -0.7,
        "empty": -0.3
      },
      "brands": [
        "Worthington",
        "PST"
      ],
      "notes": "Popular small LP cylinder in the US; often overfilled in practice.",
      "ratedCapacityCuft": 50
    },
    {
      "id": "lp72",
      "commonName": "LP72",
      "waterVolumeL": 13.2,
      "workingPressureBar": 155,
      "material": "steel",
      "typicalUse": "Vintage/ubiquitous US steel; still common on boats",
      "emptyWeightKg": 12.7,
      "buoyancyKg": {
        "full": -3.0,
        "at50bar": -1.1,
        "empty": -0.6
      },
      "brands": [
        "PST",
        "Worthington"
      ],
      "notes": "Classic 2250 psi steel; slim profile.",
      "ratedCapacityCuft": 72
    },
    {
      "id": "lp104",
      "commonName": "LP104",
      "waterVolumeL": 16.6,
      "workingPressureBar": 182,
      "material": "steel",
      "typicalUse": "US tech doubles workhorse",
      "emptyWeightKg": 20.5,
      "buoyancyKg": {
        "full": -5.0,
        "at50bar": -2.3,
        "empty": -1.5
      },
      "brands": [
        "PST",
        "Worthington"
      ],
      "notes": "Large LP steel; heavy topside; remains negative when empty.",
      "ratedCapacityCuft": 104
    },
    {
      "id": "lp108",
      "commonName": "LP108",
      "waterVolumeL": 17.0,
      "workingPressureBar": 182,
      "material": "steel",
      "typicalUse": "US tech doubles / big single",
      "emptyWeightKg": 21.5,
      "buoyancyKg": {
        "full": -5.3,
        "at50bar": -2.5,
        "empty": -1.6
      },
      "brands": [
        "Faber"
      ],
      "notes": "High-capacity LP steel; excellent for long tech dives and doubles.",
      "ratedCapacityCuft": 108
    },
    {
      "id": "steel18-232",
      "commonName": "Steel 18L 232",
      "waterVolumeL": 18.0,
      "workingPressureBar": 232,
      "material": "steel",
      "typicalUse": "Very long cold-water single",
      "emptyWeightKg": 21.0,
      "buoyancyKg": {
        "full": -5.5,
        "at50bar": -1.7,
        "empty": -0.5
      },
      "brands": [
        "Faber",
        "Eurocylinders"
      ],
      "notes": "Common EU large single; heavy but lots of gas."
    },
    {
      "id": "steel8.5-232",
      "commonName": "Steel 8.5L 232",
      "waterVolumeL": 8.5,
      "workingPressureBar": 232,
      "material": "steel",
      "typicalUse": "Small divers / twinset",
      "emptyWeightKg": 11.0,
      "buoyancyKg": {
        "full": -3.1,
        "at50bar": -1.3,
        "empty": -0.7
      },
      "brands": [
        "Faber",
        "Eurocylinders"
      ],
      "notes": "Compact EU steel; often used as twin 8.5s."
    },
    {
      "id": "ccr2_7l",
      "commonName": "CCR 2.7L",
      "waterVolumeL": 2.7,
      "workingPressureBar": 232,
      "material": "steel",
      "typicalUse": "CCR oxygen/diluent (varies by unit)",
      "emptyWeightKg": 3.9,
      "buoyancyKg": {
        "full": -1.1,
        "at50bar": -0.5,
        "empty": -0.3
      },
      "brands": [
        "Faber",
        "Eurocylinders"
      ],
      "notes": "Very common CCR bottle size; fits many frames."
    },
    {
      "id": "ccr2l-232",
      "commonName": "CCR 2L 232",
      "waterVolumeL": 2.0,
      "workingPressureBar": 232,
      "material": "steel",
      "typicalUse": "CCR oxygen/diluent",
      "emptyWeightKg": 3.2,
      "buoyancyKg": {
        "full": -1.1,
        "at50bar": -0.6,
        "empty": -0.5
      },
      "brands": [
        "Faber"
      ],
      "notes": "The EU-standard 232 bar rating of the compact CCR bottle."
    },
    {
      "id": "ccr3l-232",
      "commonName": "CCR 3L 232",
      "waterVolumeL": 3.0,
      "workingPressureBar": 232,
      "material": "steel",
      "typicalUse": "CCR diluent",
      "emptyWeightKg": 4.7,
      "buoyancyKg": {
        "full": -2.0,
        "at50bar": -1.1,
        "empty": -0.9
      },
      "brands": [
        "Faber",
        "Eurocylinders"
      ],
      "notes": "The EU-standard 232 bar rating of the common CCR diluent cylinder."
    },
    {
      "id": "steel12-200",
      "commonName": "Steel 12L 200",
      "waterVolumeL": 12.0,
      "workingPressureBar": 200,
      "material": "steel",
      "typicalUse": "Sidemount / single tank EU",
      "emptyWeightKg": 12.9,
      "buoyancyKg": {
        "full": -3.1,
        "at50bar": -0.9,
        "empty": -0.2
      },
      "brands": [
        "Faber"
      ],
      "notes": "The light 200 bar Faber 12L; popular for sidemount in Europe."
    }
  ]
}