Vacuum Suction Cup Level CompensatorsSuction Cup Level Compensator Mounting BracketsPart # 28500233 Part No. A in. (mm) B in. (mm) C in. (mm) Description Weight lb (grams) 28500233 0.75 (19.0) 1.00 (25.4) 4.00 (101.6) Mounting Bracket for SLSA-3 Alum – 1 x 4 x 0.75 0.135 (61)