... be up to 635mmHg 3.Many joints and tubes are in 1.Plastic cylinder and cylinder head,several colors are available.2 ... :0-30inHg,0-760mmHg.4.Negative pressure up to 635mmHg.5.Plastic handle.6.Release valve.7.Include the parts of ... be widely used in auto repair,leak tests,experiments,vacuum packaging and so on. Tianyou hand vacuum testing tool with guage ,car tool,auto tool