3M 37024, Extra Large Drywall Sanding Sponge 910-DDA, Dual Angle, 2-1/2 in x 8 in x 1 in, Fine, 7010375249 
Insize 4905-B500, FRAME LEVEL, 20″, 6928640378829
$1,469.97
Sensitivity .0012in/ft (=0.0057?)
No need to set zero before use
V-groove on bottom for shafts(shafts diameter .76~4.56″)
With longitudinal vial
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