Bell & Gossett bronze impeller, with a 5-1/4" outside diameter, for B&G Series 60 models 612S and 612T pumps in both iron and bronze. Impellers are installed on the end of the pump shaft, which spins the impeller in turn pumping water, or other liquid, throughout your system.Used On:172X27MF Series 60 2X2X5-1/4 All Bronze BTO / 172X27172X28MF Series 60 2X2X5-1/4 Bronze Fitted BTO / 172X28172669MF Series 60 612S Inline Pump 1HP 1750 115/208-230/1/60172745MF Series 60 612T Inline Pump 1HP 1750 208-230/460/3/60172721MF Series 60 B612S Inline Pump 1HP 1750 115/208-230/1/60172748MF Series 60 B612T Inline Pump 1HP 1750 208-230/460/3/60172952BF Series 60 627S Inline Pump 1-1/2HP 1750 115/230/1/60172953BF Series 60 627T Inline Pump 1-1/2HP 1750 208-230/460/3/60172954AB Series 60 B627S Inline Pump 1-1/2HP 1750 115/230/1/60172955AB Series 60 B627S Inline Pump 1-1/2HP 1750 208-230/460/3/601729BFMF Series 60 3X3X5-1/4 Bronze Fitted BTO / 1729BF1729ABMF Series 60 3X3X5-1/4 All Bronze BTO / 1729AB