Intex Replacement 29007E Swimming Pool Filter Cartridge H - 12 Pack High Quality OEM replacement Intex filter cartridges Features easy to clean Dacron filter material For best filtering results, replace your filter cartridge every two weeks Designed for use in Intex Cartridge Filter Pump Models 28601 and 28602 Dimensions: 3-5/8 Inches Outer Diameter x 4 Inches Long x 2 inches Inner Diameter