Intex Pool Easy Set Type B Replacement Filter Pump Cartridge (18 Pack) | 29005E Manufactured w/ Dacron filament Media Shrink wrapped with litho label Intex recommends replacing this filter cartridge every two weeks Intex Model 56611/E - Filter Pump Chlorine Generator Combination Saltwater System Intex Model 56621/E - 4000 gal/hour Filter Pump