3M 45179, Roloc Disc Pad TR, Medium 4 in 1/4-20 Internal, 7000045281 
3M 45100, Roloc Disc Pad TR, Hard 1-1/2 in 1/4-20 Internal, 7000045286 
Insize 3220-4, INSIDE MICROMETER, 3-4″, 6928640328572
$164.06
Graduation .001″
Ratchet stop.
Carbide measuring faces.
Optional accessary: setting ring (part no. 6313), micrometer stand and clamp (part no. 6301 and 6301-1).
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