OMS Cylinder comparison chart
This information is believed to be accurate, but not guaranteed.
OMS Steel Cylinder Comparison Chart
| Cylinder | Service pressure, psi | Actual air capacity, cu. Ft. (at +10%) | Outer diameter, in | Length without valve, in | Empty weight, lbs | Buoyancy Empty, lbs (w/valve) | Buoyancy Full, lbs (w/valve) |
| OMS 13 | 2400 +10% | 13 | 3.9 | 14 | 5.9 | -2.25 | -3.31 |
| OMS 20 | 2400 +10% | 20 | 3.9 | 19.5 | 7.5 | -1.5 | -3 |
| OMS 45 | 2400 +10% | 46 | 5.5 | 23 | 17.6 | 0 | -4 |
| OMS 50 | 2400 +10% | 50 | 5.5 | 25.2 | 19.92 | -1.5 | -4.8 |
| OMS 66 | 2400 +10% | 66 | 7 | 21 | 25 | -1.67 | -5.15 |
| OMS 98 | 2400 +10% | 98 | 8 | 24 | 38 | 0 | -7.73 |
| OMS 108 (112) | 2400 +10% | 112 | 8 | 26 | 41 | -1 | -8 |
| OMS 121 (125) | 2400 +10% | 125 | 8 | 29 | 45 | 0 | -9.5 |
| OMS 135 (131) | 2400 +10% | 131 | 8 | 30.7 | 47 | 0.75 | -10.31 |
