3M 24049, Wetordry Cloth Disc 281W, P1000 YF-weight, 8 in x NH, Die 800JM, 7000045052 
Standard Abrasives 712768, A/O Tapered Cone Point, C-30 80, 7100119537, 100 per case 
Insize 1121-1501, DIGITAL INSIDE POINT C, 35-150mm/1.38-6″, 6928640385056
$316.26
Resolution: .0005″/0.01mm.
Measure groove diameter.
Buttons: on/off, set, inch/mm, preset (+, -).
Automatic power off, move the digital unit to turn on power.
Battery CR2032. Data output.
Made of stainless steel.
Optional accessory: depth stop (part no. 6143), data output cable
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