The Emerson 56 Y-Frame Thru-Bolt motor is the ultimate in efficiency. The Emerson 56 Y-Frame Thru-Bolt motor has a solid mounting frame for a rigid base and its thru-bolt design keeps the motor securely in place. Its structure is built with an open drip proof enclosure and sealed ball bearings for long lasting use. Its high ambient temperature of 60 degrees Celsius combined with its thermally protected design makes it extremely resilient in pool and spa environments. The Emerson 56 Y-Frame Thru-Bolt is a dual speed pool and spa motor and can run on 4 HP or 1/2"HP. Its soft start and full-rated energy efficiency delivers reliable power.