Dynabrade 11231 Contact Arm Ass'y, 3/4" Dia. x 1/2" W, Rubber Wheel, with 1/2" W Platen 
Dynabrade 18896 Large Tip 
Insize 4726-2E, CONCENTRICITY GAGE, .039″DIA-1.575″DIA, 6928640380709
$6,701.96
With ball bearing, high stability, long working life.
Accuracy .00008″.
Optional accessory: dial test indicator
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