Hayward CX1900RE, Unicel C-8420, Pleatco PWWPC200, PAP190, Aladdin 28002, Filbur FC-1211, Waterway Pro Clean 200, 817-0200P, All American 8027 Replacement Swimming Pool Filter Cartridge PLEASE DOUBLE CHECK ... DOES YOUR CARTRIDGE MATCH THESE MEASUREMENTS ??? LENGTH: 28 3/16 inches ... OUTER DIAMETER: 8 15/16 inches ... INNER DIAMETER: 4 inches // 200 square feet ... 236 pleats Replacement Cartridge fits: Hayward CX1900RE, Star Clear Plus, Unicel C-8420, Pleatco PWWPC200, PAP190 All American Cartridges 8027Waterway Pro Clean 200, 817-0200P, Filbur FC-1211, Aladdin 28002 MADE N THE USA!!