... , 4 air cylinders, 2 high pressure connecting ducts, 2 exhaust valve, 2 single-direction valves, 1 reducer base, 1 reducer, 1 ... medium pressure meter, 1 reel and 50 meters of reel, 1 Y-shape joint and 2 rapid joints, 2 air supply valves ... , for single person’s use under medium labor intensityOpening pressure of safety valve (Mpa)1.1-1.5Max air supply (L/min ...