Rimac set the standard back in 1929 when they introduced this unit, and they’re still the industry leader today. These bench top hydraulic testers are a sure way to check spring height versus spring pressure, and we stock all the sizes/ranges available. All models will handle springs up to 2" diameter and 4 1/2" free length, so they’re useful for much more than just checking valve, transmission and clutch springs. We highly recommend the purchase of the test spring, as you will be able to test and recalibrate your unit in the field.