[High Quality Material]Made from quality Material with black coating, resistance, great strength, not easy deformation, and light weight. [Functions]Can conveniently, quickly and accurately measure valve spring installed height. Suitable for most V8 engines. [Easy & Convenient to Use]Install our 4929 Height Micrometer just like a valve spring, then expand the tool until it has seated the valve, locks and retainer. [Precise Reading]Simulated installation allows ultra precise readings. This tool is read like a micrometer, accurate to.001 inch. Its measuring height range is 1.600 inch-2.200 inch. Material:metal colour:black Package Contents: 1 * Valve spring tester Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.