Description: 【Wide Measurement Range】: This valve spring height micrometer offers a broad measurement range from 1.600 inches to 2.100 inches, with an impressive accuracy of up to 0.001 inches, making it suitable for most V8 engines 【Easy to Use】: Designed for convenience, this valve spring height measurer installs like a spring and expands to fit the correct spring retainer and lock. Simply rotate the micrometer to determine the valve spring height effortlessly 【Unique Design】: Featuring a black background with white readings, this Valve Spring Height measuring tool ensures easy readability. Its knurled texture provides non slip grip, while its lightweight yet sturdy aluminum alloy construction guarantees durability and long time performance 【Precision Tool】: Engineered for accurate measurements, this micrometer is great for quickly and accurately measuring the installed height of valve springs when used in conjunction with double spring retainers 【Package Includes】: The package contains 1 valve spring micrometer tool, designed with dimensions of a bottom diameter of 3.1 cm, top diameter of 3.7 cm, and height of 3.6 cm for optimal functionality in various applications Specification: Material: Aluminum Alloy Size Chart: Bottom Diameter: 3.1cm/1.22inch Top Diameter: 3.7cm/1.46inch Height: 3.6cm/1.42inch Package Includes: 1 Valve Spring Height Micrometer Note: Please allow slightly errors 1-2cm/0.39-0.79inch differences due to manual measurement.