This Mitutoyo 611681-531 Rectangular Gauge Block is the ideal tool for calibration and measurement. It has a width of 23/64 in. and a length of 15/16 in., with a tolerance of 0.12 microinch. Made from steel, this rectangular gauge block is ideal for calibration and measurement purposes. It has an overall height of 1 3/16 in.. This Metric Rectangular Gauge Block will help you keep your measurements accurate so that you can get the job done right.. This item has been restricted from sale in the following state (s): []