Hayward CX570XRE, Star Clear/Swim Clear C3000 C3020, Unicel C-7477, Pleatco PA75SV, Filbur FC1260, StaRite PRC75, OEM 252000175S ALL AMERICAN Swimming Pool Filter Cartridges 4 pack PLEASE DOUBLE CHECK ... DOES YOUR CARTRIDGE MATCH THESE MEASUREMENTS ??? LENGTH: 19 5/8 inches ... OUTER DIAMETER: 7 inches ... INNER DIAMETER: 3 inches tolerance plus or minus 1/16" ...75 x 4 square feet ... 161 PLEATS Replacement Cartridge fits: Hayward CX570XRE, Star Clear / Swim Clear C3000 C3020, Unicel C-7477 Pleatco PA75SV, Filbur FC-1260, Sta-Rite PRC75, OEM 25200-0175S MADE IN THE USA! ... When you make a purchase, you're supporting a small business with the entrepreneurial spirit that made America great!