Description: 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 Application For： SPA Pump, 4HP Hot Tub Pump - 2 Speed SPA Pump Motor 230V, 2" Intake and 2" Discharge，56 Frame (Model: 3721621-1D) Package: 1×3721621-1D Spa Pump W/o Product Instruction .
eBay