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″.

Insize 7341-0S, PIN GAGE HANDLE (with 1pc handle and 6 pairs of collecting bushes),.008-.040", 6928640370854
3M 9145, Disc Pad Holder, 4-1/2 in x 1/8 in x 3/8 in 5/8-11 Internal, 7000046035
3M 97419, Aluminum Foil Tape 3380, Silver, 48 mm x 45 m, 3.25 mil, 7000049613
3M 00949, Scotch-Brite Clean and Strip Disc, CS-DC, SiC Extra Coarse, 6 in x 5/8 in, 7100054081 