... ,rubber piston ring and valves.4.Precise pressure gauge:0-30inHg,0-760mmHg.5.Negative pressure up to 635mmHg.6.Release ... hard case package.10.The standardized configuration contains a vacuum tube,a vacuum meter,a brake fluid reservoir and pipe joints, ... used in auto repair,leak tests,experiments,vacuum packaging and so on. Brass,negative pressure, auto repair testing tools & hand vacuum pump,TS8003