GSG Depth Micrometer Calibration Master The GSG ADM Depth Mic Masters come in both English & Metric versions. The two piece construction allows you to check depth micrometers with a range of .500" to 11.500" in standard or 12.5mm to 287mm in Metric. Each landing is divided into 1.00" or 25.4mm steps. Features include... 6 Measuring / Setting Steps Inch Version .50", 1.50", 2.50", 3.50", 4.50", 5.50" +0.0001" Accuracy Metric Version 12.5mm, 37.5mm, 62.5mm, 87.5mm, 112.5mm, 137.5mm +0.0025mm Acuracy With Optional Riser... Inch version .50", 1.50", 2.50", 3.50", 4.50", 5.50", 6.50", 7.50", 8.50", 9.50", 10.50", 11.50" +0.0002" Accuracy Metric Version 12.5mm, 37.5mm, 62.5mm, 87.5mm, 112.5mm, 137.5mm, 162.5mm, 187.5mm, 212.5mm, 237.5mm, 262.5mm, 287.5mm +0.0025mm Acuracy Lead Times are about 4-6 weeks ARO. Select Inch / Metric from Pulldown Menu