METRIC STREAMLINE SHAFT ANODE ZINC SHAFT SIZE: 50MM" DIA. LENGTH: 3" OUTSIDE DIA.: 3 3/4" WEIGHT: 2.6 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