1.Material:Brass and Nylon 2.Negative pressure up to 635mmHg 3.Color:Red 4.Package:Blow molded ... ,rubber piston ring and valves.4.Precise pressure gauge:0-30inHg,0-760mmHg.5.Negative pressure up to 635mmHg.6.Release valve.7 ... repair,leak tests,experiments,vacuum packaging and so on. Brass, Negative pressure, Brake Bleeder Kit,Auto repair tools,TS8003