3M 14593, Scotch-Brite Cut and Polish Disc, 3" x 1-1/4" x 1/4" A Medium, D5, 7000045941, Box of 10 
Insize 3287-1, GROOVE MICROMETER, 0-1″, 6928640327551
$455.93
Graduation .001″.
Measure width of grooves inside bores.
Non-rotating spindle.
Two graduations for inside and outside measurement.
Related products
Measuring/ Inspection Instruments
Insize 0020-A199, VIBRATION PEN (THREE PARAMETERS), 6974029777059
$1,044.21
Measuring/ Inspection Instruments
Insize 6140, DEPTH BASE ATTACHMENT, suitable for calipers with beam width (w) .630″, 6928640303579
$24.78
Measuring/ Inspection Instruments
Insize 4809, U.S. STAND SHEET METAL GAGE, 0-36(.3125~.0070″), 6928640330162
$35.18