3M 45100, Roloc Disc Pad TR, Hard 1-1/2 in 1/4-20 Internal, 7000045286 
Insize 3228-4, WIDE RANGE THREE POINTS INTERNAL MICROMETER, 2.8-4″, 6928640356629
$761.63
Graduation .0001″
Setting ring 2.8″ DIA (included)
Carbide measuring faces.
Ratchet stop.
Setting ring are included (except part no. 3228-12)
Supplied with manufacturer inspection certificate.
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