3M 45097, Roloc Disc Pad TR, Extra Hard 2 in 1/4-20 Internal, 7000045284 
Insize 6805-2, V-BLOCK SETS, 7.874_6.693_3.543″, 6940561971033
$1,196.61
For positioning cylindrical workpieces
Two V-blocks per set.
Each V-block has four 90? V-grooves
Hardness HB170-240
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