... are available.2.Replaceable cylinder head O-rings,rubber piston ring and valves.3.Precise pressure gauge:0-30inHg,0-760mmHg ... hard case package.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. Tianyou plastic hand vacuum pump