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Specifications Spare Air Model 300 (regular air and Nitrox) Max Capacity: 3.0 cu ft / 85 liters Diameter: 2.25” / 5.71 cm Max Pressure: 3000 psi / 207 bar Weight : 2.17 lb. / .985 kg Surface Breaths*: 57 Specifications Spare Air Model 170 Max Capacity: 1.7 cu ft / 48 liters Diameter: 2.25” / 5.71 cm Max Pressure: 3000 psi / 207 bar Weight : 1.51 lb. / .687 kg Surface Breaths*: 32 The first Spare Air was specifically designed for SCUBA Diving out-of-air emergencies. Since 1979, we have provided the lowest costing and best selling redundant air supply in the world. Specifications Xtreme Model 170X...