3M 13172, Scotch-Brite Multi-Finishing Wheel, MU-WL, 2S Fine, 6 in x 1 in x 1 in, 7000136471 
Insize 2433-E120, INTERNAL GROOVE BORE GAGE, 2.4-4.7″, 6928640379055
$8,732.95
Measure diameter of internal grooves (width of groove _3mm)
Anvil is needed
Optional accessory:0.01mm or 0.001mm graduation dial indicators, setting ring
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