3M 50728, Hookit Purple+ Curved Adapter Set Multi Hole, 70 mm x 127 mm, 7000032209 
Insize 2187-275, ADJUSTABLE SNAP GAGE, 10.35-10.83″, 6928640314698
$959.19
Used as Go/No-Go gage by setting upper and lower limits.
Flatness of anvil: 59_in.
Parallelism between tips and anvil: range 0-1.26″: 118_in,
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