This Replacement filter cartridge has the technical specifications as Unicel # C-8600, Pleatco # PA80, Filbur # FC-1280 and it complies with the OEM # CX800RE specifications. This 17 3/8 inch long and 8 ½ inch wide filter cartridge is efficient to handle the top load of 75 sq ft. It provides clean and clear water in Hayward Star-Clear ll C800, Star-Clear ll C1500, Cal Spas, free from any kind of dust, sand and worms. Very easy to install this filter cartridge is made of superior quality of material.