Aluminium,positive and negative pressure ,Automoti

1.Aluminium cylinder and cylinder head. 2.Replaceable cylinder head O-rings,rubber piston ring and valves. 3.The body is the switch to control two kinds of pressure conditions. Pressure range:positive pressure.0 to 3inHg;negative pressure.0 to -1inHg. 4.The pressure gauge is enclosed in a rugged rubber boot which provides protection for both gauge(to insure accuracy) and vehicle surfaces. 5.Include the parts of brake bleeder,easily bleed brakes by yourself. 6.Detailed English/German/Spanish instruction manual. 7.Blow molded hard case package. 8.The standardized configuration contains a vacuum tube,a pressure gauge,a brake fluid reservoir and pipe joints,to be widely used in auto repair,leak tests,experiments,vacuum packaging and so on.