Hayward Star-Clear cartridge filters provide sparkling pure water for a wide range of pool sizes and types. From spas and hot tubs to above- and in-ground pools, they deliver full-sized filter system performance in an easy-to-afford package. StarClear filters feature a heavy duty cartridge element engineered from high quality reinforced polyester, for maximum efficiency, easier cleaning and longer life. A single locking knob provides easy access to the cartridge element and securely fastens the filter head to the filter tank — eliminating clamps or bolts. An attractive injection molded, corrosion-proof filter body sets the standard for value and convenience.