3M 45098, Roloc Disc Pad TR, Soft 1-1/2 in 1/4-20 Internal, 7000045277 
Insize 2307-1RF, REVERSE READING DIAL INDICATOR, 1″, flat back, 6928640360602
$40.38
Graduation .001″
Meet ASME B89.1.10M-2001.
Supplied with limit pointers and bezel clamp.
Optional accessory: backs, contact points.
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