3M 07056, Drywall Sanding Sponge CP-042, Single Angle, 2-7/8 in x 4-7/8 in x 1 in, Fine, 7100101555 
Insize 3229-20, TUBULAR INSIDE MICROMETER, 19-20″, 6928640356902
$269.47
Graduation .001″
Carbide measuring faces.
19 to 20″ Range
Accuracy: .00043″
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