AOS Motor 56FR 4.0HP 2Spd 230V Thru Bolt Horizon # 35-126-1156 Manf. A.O. Smith Manf. # B235 Century Flex-48® Spa&Tub Motor 56 Frame Two Speed with Stand, Threaded Shaft, Thru Bolts Motor Used in Following Pumps: 34-270-W015 Waterway Executive 56 Frame Parts & Wetends 34-402-W017 AquaFlo Flo-Master XP2 56-Frame Identical to: AOSB235, 5298-0, 3721621, 3721821