Mitutoyo Tube Micrometer w/ SPC Output Designed to measure the wall thickness of various tubing. Specifications include... 0-1" / 25.4mm Measuring Range 0.00005" / 0.001mm Resolution + 0.00015" Accuracy Spherical Post Dimensions... 0.272" Bottom Post Diameter 0.315" Cylindrical Diameter 0.354" Height of Measuring Cylinder Features include... Carbide Tipped Measuring Face Ratchet Stop for constant force SPC Output Supplied in fitted case IP65 Rated Protection