... ,rubber piston rings and valves.3.Precise pressure gauge:0-30inHg,0-760mmHg.4.Negative pressure up to 635mmHg.5.Steel handle ... package are available.10.The standardized configuration contains a vacuum tube,a vacuum meter,a brake fluid reservoir and pipe joints,to ... be widely used in auto repair,leak tests,experiments,vacuum packaging and so on. Brass Negative pressure Hand Vacuum Pump TS8001