3M 35831, Hookit Dust Extraction Flexible Radius Sanding Block, 178 mm x 66 mm, 7100256512 
Insize 4801-15E, RADIUS GAGE, 1/32″-1/4″, 6928640330056
$26.64
Radius Gage Set Range 1/32″ to 1/4″
15 Internal Leaves and 15 External leaves
Accuracy +/- .0012″
Made of medium carbon steel
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