1.Material:Brass and Nylon 2.Negative pressure up to ... .Package:Blow molded hard case 1.Brass cylinder and cylinder head.2.Nylon cylinder coverd handle,several ... .Replaceable cylinder head O-rings,rubber piston ring and valves.4.Precise pressure gauge:0-30inHg,0- ... in auto repair,leak tests,experiments,vacuum packaging and so on. Brass, Negative pressure, Brake Bleeder Kit,Auto repair tools,TS8003