Features： 1、 Material: Pool filter cartridge sponge is made of 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 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. Specification： Item Type: Pool Filter Cartridge Sponge Material: Sponge Gross Weight: Approx. 62g/2.2oz Category: Filter Cotton, Filter Height: 8cm / 3.1in, Inner Diameter 5.2cm / 2.0in Use: Pool Cleaning Package List： 4 x Pool Filter Cartridge Sponge