This is a C4030 Pool Filters Cartridge Compatible with Hayward SwimClear C4030 C4025 C4020. It is new in box. Fits Hayward SwimClear C-4030/C-4025/C-4020 pool filter, and replaces Hayward CX880XRE, Pleatco PA106/PA106-4/PA106-PAK4, Unicel C-7488/C-7488-4, Filbur FC-1226/FC-6430, Pure N Clean PC-1226/PC-6430. Filter Dimensions: Length: 25-1/2″; Outside Diameter: 7″; Top & Bottom Openings: 3.