Description 1" diameter shaft, 1/2" NPT ports, 15.8 gpm maximum flow, 370 rpm maximum speed. 11.5 hp rating. Will replace Char Lynn 101-1004, Prince BMPCH 160 H4 KP This item is a suitable alternative for the following: 197-82395383, 101-1004, 101-1004-009, BMPCH160H4KP, CM044P