3M 54357, Particulate Respirator 8246, R95, with Nuisance Level, Acid Gas Relief, 7000002059, 120 EA/Case 
Insize 4906-B150, BLOCK LEVEL, 6×6″ , 6928640378836
$936.17
Sensitivity .0012in/ft (=0.0057?)
No need to set zero before use
Three V-grooves for shafts (shafts diameter .76~4.56″)
With longitudinal vial
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