Bell & Gossett bronze impeller, with a 7" outside diameter, for B&G Series 60 models 1-1/2A and 618T pumps. 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:172X33 MF Series 60 1-1/2X1-1/2X7 All Bronze BTO/ 172X33172X34 MF Series 60 1-1/2X1-1/2X7 Bronze Fitted BTO / 172X34172672 MF Series 60 618T Inline Pump 2HP 1750 208-230/460/3/60Replaces P/N PWH-635-CBZUsed on Bell and Gossett 11/2 x 7, 60 Series 618T (172672)