Accuracy: 1% of deviation between workpiece size and setting ring, or example measuring inner groove of 21mm, use a 20mm setting ring for calibration, accuracy is (21-20)_1%=0.01mm
Eepeatability .0005″
Optional accessory: digital indicator
Suitable for contact point except 2436-200L, digital indicator, setting ring

3M 26120, PPS Series 2.0 Adapter, Type S28, 17.5 mm Female, 19 TPI
Thread, 7100135956
3M 87153, Cubitron II Depressed Center Grinding Wheel, T27 Quick Change, 9 in x 1/4 in x 5/8-11 in, 7100103313, 20 per case
3M 64319, Cubitron II Depressed Center Grinding Wheel, T27 Quick Change, 7 in x 1/4 in x 5/8-11 in, 7100103317, 20 per case
3M 97419, Aluminum Foil Tape 3380, Silver, 48 mm x 45 m, 3.25 mil, 7000049613
Insize 7231, SCRIBER, 6928640320071 