Mitutoyo 575-123 Absolute Digimatic Indicator, ID-U Type, Inch/Metric, #4-48 UNF Thread, 3/8" Stem Dia., Flat Back, 0-1" (0-25.4mm) Range, 0.0005" (0.01mm) Resolution, +/-0.0008" Accuracy, Meets IP42 Specifications Electronic indicator measures 0 to 1.0" (0 to 25.4mm) with 0.0005" (0.01mm) resolution and + or - 0.0008" accuracy, for measuring short linear distances in mechanical engineering, machining, and manufacturing applications LCD screen with character height of 8mm displays measurements in inches and metric units Depth of 23mm and approximately 20,000 hour battery life make this suitable for installation into measuring devices Absolute electrostatic capacitance-type linear encoder for accurate measurements Ingress Protection certified IP42 for protection against objects greater than 1mm and dripping water