Standard Abrasives 726002, A/O R6 Straight Precision Cartridge Roll, 3/8 in x 1-3/4 in x 1/4 in 100, 7100098743 
Insize 4789-3E, CONCENTRICITY GAGE, 6928640358302
$1,892.39
Applicable diameter .039″ DIA~.984″ DIA
Accuracy .00008″.
Optional accessory: dial test indicator, mini magnetic stand (part no. 6224-40E).
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