Sta-Rite Posi-Clear PXC-125 Replacement Filter Cartridge, Unicel C-8413, Pleatco PWWPC125B, Waterway Plastics Pro Clean 125, OEM 25230-01255 Swimming Pool Filter Cartridge LENGTH 28 3/16 inches ... OUTER DIAMETER 8 15/16 inches ... INNER DIAMETER 4 inches 125 square feet 184 pleats PLEASE CHECK YOUR CARTRIDGE MEASUREMENTS Replacement Cartridge fits: Sta-Rite Posi-Clear PXC-125, Unicel C-8413, Pleatco PWWPC125B Waterway Plastics Pro Clean 125, Aladdin 22508, OEM 25230-0125S MADE IN THE USA!