Mayfair. Efficient, powerful motor draws less amperage & is designed for long lasting service. Easy-to-remove cartridge with convenient locking tab for easy cleaning and changing. Rugged impeller is molded of a glass/resin composite for abrasion resistance. Resin compaound base resists shock, detergents, fuel & corrosion. Molded-in "T" brackets to allow mounting of #2601 auto switch for easy automation. Outlet hose size 3/4".