Vacuum Suction Cup Level CompensatorsSuction Cup Level Compensator Mounting BracketsPart # 28500231 Part No. A in. (mm) B in. (mm) C in. (mm) Description Weight lb (grams) 28500231 0.75 (19.0) 2.00 (50.8) 5.00 (127) Mounting Bracket for SLSA-3 Alum – 2 x 5 x 0.75 0.163 (74)