1、Premium Material: Pool filter cartridge sponge is made of premium sponge material, which is very environmental and will not pollute the water or the environment. Does not break easily. 2、Reusable: Replacement filter sponge has excellent elasticity and ductility. Can be reused, long service life, effectively reduce pool costs. 3、Washable: Filter pump cartridge sponge can be cleaned with a warm soapy water mixture and then rinsed off with water. 4、Effective Filtration: Sponge filter replacement foam can help clean particles and debris, filter a variety of impurities, hair, sand, dust, leaves, to keep the water clean. 5、Application: Sponge filter replacement foam is 3.1in high and 2.0in inner diameter, suitable for spas, swimming pools, bathrooms, fish tanks and other places. Premium Material: Pool filter cartridge sponge is made of premium sponge material, which is very environmental and will not pollute the water or the environment. Does not break easily. 2 Reusable: Replacement filter sponge has excellent elasticity and ductility. Can be reused, long service life, effectively reduce pool costs. 3 Washable: Filter pump cartridge sponge can be cleaned with a warm soapy water mixture and then rinsed off with water. 4 Effective Filtration: Sponge filter replacement foam can help clean particles and debris, filter a variety of impurities, hair, sand, dust, leaves, to keep the water clean. 5 Application: Sponge filter replacement foam is 3.1in high and 2.0in inner diameter, suitable for spas, swimming pools, bathrooms, fish tanks and other places.