1.Material:brass 2.Negative pressure can be up to 635mmHg 3.Many joints and tubes ... ,rubber piston rings and valves.3.Precise pressure gauge:0-30inHg,0-760mmHg.4.Negative pressure up to 635mmHg.5.Steel handle ... widely used in auto repair,leak tests,experiments,vacuum packaging and so on. Brass,negative pressure,brake pressure test kit,auto repair tools,TS8001 ...