3M 88741, Hookit Center Water Feed Disc Hand Pad, 2 in x 5/8 in, 7000045712 
Insize 4725-45E, CONCENTRICITY GAGE, Diameter range .118 -1.772″, Center height 3.150″, 6928640378966
$2,014.66
With ball bearing, high stability, long working life
Accuracy 2um
Optional accessory: dial test indicator
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