Standard Abrasives 707505, PSA A/O Disc, 12 in x NH, 40 Grit, 7010369974 
Insize 4901-12, BLOCK LEVEL, 12″, 6928640373886
$317.13
Sensitivity .00024in/ft (=0.001?)
V-groove on bottom for shafts (shafts diameter .63~2.76″)
With transverse vial
Supplied with adjusting wrench
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