SHAFT LIMITED CLEARANCE COLLAR ANODE ALUMINUM SHAFT SIZE: 1 1/4" DIA. THICKNESS: 1 1/4" OUTSIDE DIA.: 2 1/2" WEIGHT: 1.0 LBS EASY SIZE VERIFICATION INSIDE AND OUTSIDE EASY INSTALLATION - DEEP SLOTTED S.S. MACHINE SCREWS FOR MAXIUMUM TORQUE INNOVATIVE O-RINGS KEEP SCREWS FROM FALLING OUT