... mask,Damand valve,Pressure reducer,Warning whistle,Pressure Gauge,Back plate and cylinder. For field operation respiration. Has thermostablly, ... demand valve, pressure reducer,warning whistle,pressure gauge,back plate and carbon fiber cylinder. Wearing quality 10.2kg.Mask( ... specifications of cylinders. Braces uses anti-burns mylar ribbon, wear-resisting, prevent slippery, don't need any tools can be ...