description":"Designed for 0.5L oxygen cylinder and the inflatable pressure is strictly prohibited exceed 3000 psi or 200 bar.  Feature: Inflated pressure is not allowed to be more than 3000 psi or 200 bar. For M18X1.5 0.5L oxygen cylinder(not include). Large purge and food grade silicone mouthpiece. Aluminum alloy body and steel pressure gauge are corrosion resistant. Specification: Material: Aluminum alloy + Silicone Tread: M18X1.5 Size: 11.5 * 6.7cm / 4.5 * 2.6in Weight: 377g / 13.3oz Package weight: 377g / 13.3oz Package List: 1 * Scuba Regulator