Feature: Suitable for most V8 engines, quickly and accurately measure the installation height of valve springs.The Valve Spring Height Micrometer measures the installed height range from 1.600"- 2.200" with an accuracy of 0.001".The valve spring height micrometer gauge is easy to install, set and read the spring height and is sized to fit inside the step on top of the tool.When checking the spring load, the retainer is installed in the spring, so the thickness of the retainer is not included in the calculation of the installation height.Made of durable material with black surface, corrosion-resistant, light-weight, anti-corrosion, strong and durable, long service life.Specificatoin:Condition: NewType:Valve Spring Height Micrometer MeasurerColor: BlackMaterial: MetalTotal Size: 38x38mm / 1.50"x1.50"(L*W)Inner Diameter: 19mm / 0.