🐱👤 RHZKF6.8/30 SCBA Self Contained Breathing Apparatus. ISO9001,GB2890-1995. ✔ RHZK positive pressure fire-fighting air respirator is a new model of self supporting open respirator, which is widely used in fire-fighting ,chemistry industry,fired boat, petroleum industry and transportation. ✔ It is a high-performance respiratory positive device designed for fireman, and special trained person to perform the extinguish, rescue and ambulance.