EX-LIBRIS® Book Measuring Device

This versatile book measuring tool allows you to measure books quickly and efficiently to create the most accurate phase boxes possible. Measure length, width, and thickness of a book in just seconds with the movable gauge. Constructed of rugged maple plywood and featuring a built-in stainless-steel rule that allows you to measure in either inches or millimeters. Please note: the error margin is about +- 2 mm. Price each.