Check the listing for details. 66834 Mini Valve Spring Tester Range 0- 700 LBS Vise Arbor Mount. Condition: New. Listed at 75.52 USD. Fitment:The 66834 mini valve spring tester has a wider range of 0-700 with 10-pound increments. Double scale measuring units are easy to read, measuring range is 0-700 psi / 0-50 kg-cm2 Features: 1) The 66834 mini valve spring tester are an affordable and portable way to test springs. Racer need to know what a valve spring’s pressure, or rate, is both at assembly and after use. Coil springs will wear out and lose pressure with use, so racers need to periodically check spring rate to make sure that they’re up to the job after a few races. Also, sometimes a performance drop-off can be caused by worn out springs, leading a racer to check them 2) The valve spring tester have double scale measuring units make easy to read data. The tester features a rubber gauge protector to help keep the gauge housing protected 3) The Hex-design body is very versatile, so it can be used in a vise or an arbor press. To use 66834 mini valve spring tester, just install the tester and a spring in a vice or arbor press and check the pressure at the spring’s installed and open heights 4) These hydraulic models are supplied complete with a recalibration feature and a rubber gauge protector Package included:Mini Valve Spring Tester