PEC 6 pc 3/8″ -2-1/4″Adjustable Parallel Set NOS
Consists of two precision ground pieces which slide smoothly on each other. Locked into position by set screws. 1-5/16″ – 1-3/4″: ±0.0009″. 15/16″ – 1-5/16″: ±0.0008″. 11/16″ – 15/16″: ±0.0007″. 1/2″ – 11/16″: ±0.0005″.