Check the listing for details. 3721621-1D Plastics Executive 56 Frame 4 HP Spa Pump, 230-Volt Swimming Hot Tubs. Condition: New. Listed at 249.26 USD. Features & Details Executive wet end designed specifically for 56-frame motors Two double shielded ball bearings with moisture resistant grease for quieter operation and longer life Two speed motors have four sets of insulated windings for increased efficiency 56-frame motor for added strength, cooler operating temperature, and longer motor life Larger 2" intake for improved flow performance and reduced noise Fits For SPA Pump, 4HP Hot Tub Pump - 2 Speed SPA Pump Motor 230V, 2" Port, 56 Frame (Model: 3721621-1D) Package Content 1×3721621-1D Spa Pump .Features & Details Executive wet end designed specifically for 56-frame motors Two double shielded ball bearings with moisture resistant grease for quieter operation and longer life Two speed motors have four sets of insulated windings for increased efficiency 56-frame motor for added strength, cooler operating temperature, and longer motor life Larger 2" intake for improved flow performance and reduced noise Fits For SPA Pump, 4HP Hot Tub Pump - 2 Speed SPA Pump Motor 230V, 2" Port, 56 Frame (Model: 3721621-1D) Package Content 1×3721621-1D Spa Pump .