3M 77257 Scotch-Brite Durable Flex Belt, 3/8 in x 13 in, A CRS, 10 per inner, 7010409609 
Insize 4168-18E, STEEL STANDARD BALLS, 5/8″, 6940561981568
$20.16
To measure angle and diameter of taper holes
Material: tool steel
Hardness: HRC63
Diameter accuracy:?.00012?
Roundness .00004″
Supplied with manufacturer inspection certificate.
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