... Haolin Industrial Co., Ltd. Respirator With Steel Cylinder,Chemical respirator,Security with 100% Silicone mask Item standard1. 300Bar / 4500psi2. ... fighter or lifesaver for the firefighting, rescue, lifesaving, safety and effectively to protect from thick smokes, toxic gases ... oxygen deficiency, it is a ideal personnel respiratory protective device for fire-fighter and lifesaver 1.2 ScopeA.Atmospheric ...