For zero setting of inside micrometers, three points internal micrometers and bore gages.
Deviation is the difference between the ordered size and the size marked on the setting ring when supplied.
For example, the ordered size is .2”, the size marked on the setting ring when supplied may be .20008″.
setting ring when supplied may be .20008″.

Insize ISY-100-27016, SUPPORT HEAD, aluminum, 6928640393792
3M 19765, Utility Cloth Sheet 314D, 9 in x 11 in P280 J-weight, 7000000353
Standard Abrasives 702229, A/O Full Taper Cartridge Roll, 3/8 in x 1 in x 1/8 in 120, 7100085861 