Ball gage: Features sphericity within 0.000025" and surface finish to 1.5 microinches; this gage set includes 25 pairs
Accurate Readings: Chrome steel ball set with Grade 24 accuracy and AFBMA certificate; within 0.0001" of actual size
Durable Material: This gage ball set is made of ground-lapped chrome steel hardened to 63RC
Set Includes: A case for storage and ball pair sizes of 0.125, 0.14, 0.156, 0.18, 0.21, 0.25, 0.28, 0.31, 0.34, 0.375, 0.4, 0.43, 0.46, 0.5, 0.53, 0.56, 0.59, 0.625, 0.656, 0.68, 0.71, 0.75, 0.81, 0.87, 0.93, and 1 inch
