Pentair 77707-0256 Combustion Air Blower Replacement Kit Pool and Spa Propane Gas Heater Combustion air blower replacement kit Fits Pentair MasterTemp pool and spa propane gas heater model 400LP Also fits Pentair Sta-Rite Max-E-Therm pool and spa propane gas heater model 400LP Includes single volt blower adapter Measures 12-inch length by 12-inch width by 12-inch height