Swimming pool filtration -2x Pool Filter Foam Sponge Cartridge For Type S1 D' Highlights generic brand 2x Pool Filter Foam Sponge Cartridge For Type S1 D' Description: Replacement Your paper filter cartridge is part of your pool's routine maintenance and regular cartridge replacement can be costly. These washable and reusable foam filters will reduce your costs. The initial cost of this cartridge is slightly more than a paper cartridge, but will last a long time for a cartridge. This foam filter will outlast your paper cartridges and can be washed and reused multiple times. Advise to change a paper cartridge every week, whereas these foams can simply be washed and replaced. You should see a foam filter last around 2 months. The only thing you need to do is remove this filter when shock treating the pool, as overchlorination will quickly break down the foam. Normal levels of chlorine and bromine sanitization are good and these foams have been tested at normal levels. Specification: Material: PU Sponge Color: Black/White Size Chart: 10.8x7.3x4cm/4.25x2.87x1.57inch; fit for Intex Type S1 Package includes: 2 x swimming pool foam filters Note: Please allow slight measurement deviation due to manual measurement.