Standard Abrasives 42655, A/O Flap Wheel 624406, 2-1/2 in x 1 in x 1/4-20 in 80, 7010369118, 10 per case 
Insize 6313-2D5, SETTING RING, 2.5″ dia, 6928640357770
$206.22
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″.
