Dynabrade 90874 2" Dia. Very Fine NWN DynaBrite Locking-Type Disc, 25/pack 
Insize 2187-120, ADJUSTABLE SNAP GAGE, 4.49-4.72″, 6928640314544
$278.14
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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