[High Quality Material]Made from quality aluminium 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. Its measuring height range is 1.600 inch-2.200 inch., Weight: 0.17416518698 pounds, Manufacturer: Aboiled