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 0.236" Tall x 0.138" Diameter Pin Dimensions Features include... Carbide Tipped Measuring Face Ratchet Stop for constant force SPC Output Supplied in fitted case IP65 Rated Protection