1. Material - PU sponge; Size: 20.0 * 10.0cm (L x W) / 7.87 '' * 3.94 ''; Shape: cylindrical. 2. Suitable for Intex filter pumps using type a cartridge. 3. Reusable and washable, the package includes 2 x type a filter sponge. 4. Features - Good air permeability, activated carbon is melted into the fiber, with strong adsorption; Soft, not easy to deform, corrosion resistance. 5. Flexible use - you can cut swimming pool filter foam according to your needs.Qualsiasi qualit del prodotto, non esitate a contattarci. Normal levels of chlorine and bromine disinfectants can be used. These foams have been tested to normal levels and far exceed similar products. The only thing you need to do is take it off when shaking the pool, as excessive chlorination will quickly break down the foam. It is recommended to use a foam filter to replace a box every week, these foams can be easily cleaned and replaced, which can lower your costs.