This Replacement filter cartridge replaces Unicel # C-4309, Pleatco # PGF10 and Filbur # FC-3743 and complies with OEM # PGF-10. This 8 inch long and 4 ¾ inch wide replacement filter cartridge is able to handle the top load of 10 square foot and best fit for General Foam Plastics, Pleatco. It is made of high quality materials and very easy to install. With 1 ¾ inch open holes both at the top as well as bottom this filter cartridge provides your pure water for your pools and spas free from sand and germs.