3M 93553, Double Coated Tape GPT-020F, Transparent, Level Wound, 19 mm x 2000 m, 7100243951 
Insize 4906-150, FRAME LEVEL, 6_6″, 6928640324963
$1,318.18
Sensitivity .0024in/ft (=0.001?)
No need to set zero before use.
Three V-grooves for shafts (shafts diameter .76~4.56″).
With longitudinal vial.
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