Specificatoin:Condition: Brand NewColor: BlackMaterial: MetalTotal Size: 38x38mm / 1.50"x1.50"(L*W)Inner Diameter: 19mm / 0.75"Feature: Measure installed valve spring height conveniently and accurately. This simulated seat pressure allows ultra precise readings.Great strength and lightweight, anti-corrosion, durable to use, and no deformation.Since the retainer is installed in the spring when checking the spring loads, make certain that the thickness of the retainer is not included when calculating the installed height and is accounted for when compressing the spring. The spring load checker will show to be higher with the spring installed at the correct height.Suitable for all vehicle types.Package included:1 x Valve Spring Height Micrometer Measurer.