Brand New Elite Aseptic Spa Filter Cartridge - Replacement for Pleatco PWW50P3-M, Unicel 6CH-940RA, Filbur FC-0395M Hurricane HF6H940-01M Cartridge Filter is compatible for Unicel: 6CH-940RA, Pleatco: PWW50P3-M, Filbur: FC-0395M, and other compatible models. Dimensions: Length 7.625 inches, outer diameter 6 inches, Top handle, Bottom hole 1.5 SAE Threaded inches Tighter filtration capabilities compared to tri lobal media material or classic point bonded media. That means a superior filtration of biomass, dirt, debris, hair, leaves and critters to help keep your pool or spa aseptic.