3M 03140, General Purpose Sanding Sponge CP041-6P, Single Angle, 2-7/8 in x 4-7/8 in x 1 in, Medium, 7100101537, 6/pack 
Insize 2222-E06, INTERNAL DIAL CALIPER GAGE, .2-.6″, 6928640358432
$278.14
Graduation .0005″
Range: .2-.6″
Accuracy: ? .0012″
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