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 3229-13, TUBULAR INSIDE MICROMETER, 12-13″, 6928640328879
$214.02
Graduation .001″
Carbide measuring faces.
12 to 13″ Range
Accuracy: .00036″
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