3M 45190, Disc Pad Hub, 4-1/2 in 5/8-11 Internal, 7000045659 
Insize 6884-E24, CALIPER/HEIGHT GAGE CHECKER, 0-24″, 6928640358883
$4,422.36
To check calipers and height gages.
Constructed with steel gage blocks.
Size: 0-24″
Accuracy: +/- 300?in.
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