Rotary 7417. FITS MURRAY 1989 & UP 40" DECK, 40600 SERIES. USED WITH ROTARY #6890 SPLINED SHAFT. SPLINED ID. Spindle Pulley / Murray 91769MAPack Size:1Murray 91769, Murray 91943, Murray 91769MA, Murray 91943MAEdgewater 505605, ESF 165-357, Foley/Belsaw 5979845, Foley/PLP 165-357, NHC 276-0644, Oregon 44-341, Rotary 7417, Sunbelt MU-53, Sunbelt B1MU53Murray 36" and 38" decksID: 5/8 " SPLINED, OD: 5 1/4 ", For splined shaft model, Jackshaft pulley