4 PACK Hayward CX1380XRE, Super Star Clear/Swim Clear C5500, ALL AMERICAN Replacement Filter Cartridges, Unicel C-7490, Pleatco PA137, Aladdin 23705, Filbur FC-1297 Swimming Pool Filter Cartridges LENGTH 32 13/16 inches ... OUTER DIAMETER 7 inches ... INNER DIAMETER 3 inches // 4 oz...4x137 square feet PLEASE DOUBLE CHECK YOUR CARTRIDGE MEASUREMENTS Replacement Cartridge fits: Hayward CX1380XRE, Super Star Clear/Swim Clear C5500, Unicel C-7490, Aladdin 23705, Pleatco PA137, Filbur FC-127 MADE IN THE USA!