... trolley, carbon fiber cylinder, air supply pipe, Reducer, air supply valve Produce name: Baoya Air Cart Breathing apparatusModel: RHZKF4×6.8 ... Constitution: Stainless steel trolley, carbon fiber cylinder, air supply pipe, Reducer, air supply valve and full face mask, etc.Configuration ... ensure sufficient respiratory flow. 7. The stainless steel cart has good anti-corrosion property.8. Unique stainless ...