Feature 1Premium 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. 2Reusable: Replacement filter sponge has excellent elasticity and ductility. Can be reused, long service life, effectively reduce pool costs. 3Washable: Filter pump cartridge sponge can be cleaned with a warm soapy water mixture and then rinsed off with water. 4Effective 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. 5Application: Sponge filter replacement foam is 3.1in high and 2.0in inner diameter, suitable for spas, swimming pools, bathrooms, fish tanks and other places.SpecificationItem Type: Pool Filter Cartridge SpongeMaterial: SpongeGross Weight: Approx. 62g/2.2ozCategory: Filter Cotton, FilterHeight: 8cm / 3.1in, Inner Diameter 5.2cm / 2.0inUse: Pool Cleaning .wang-edit-text{ font-family:'Arial' !important; } .wang-edit-text table { border-top: 1px solid #000; border-left: 1px solid #000; } .wang-edit-text table td, .wang-edit-text table th { border-bottom: 1px solid #000; border-right: 1px solid #000; padding: 3px 5px; } .wang-edit-text table th { text-align: center; }Package List4 x PoolFilterCartridgeSpongeNote1. Shipment does not include filter housing2. Manual measurement, please allow slight error.