Features: 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. 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 Features Premium Material: Made of high-quality sponge material, ensuring environmental friendliness and non-pollution of water or the environment. With strong durability, it does not break easily, providing long-term use and value. Reusable: The replacement filter sponge exhibits excellent elasticity and ductility, allowing for multiple uses and a prolonged service life, effectively reducing pool maintenance costs over time. Washable: Easily clean the filter pump cartridge sponge with a warm soapy water mixture and rinse off with water, ensuring convenient maintenance and prolonged effectiveness. Effective Filtration: This sponge filter replacement foam efficiently cleans particles, debris, and a variety of impurities including hair, sand, dust, and leaves, ensuring consistently clean water. Application: With dimensions of 3.1 inches high and 2.0 inches inner diameter, this sponge filter replacement foam is suitable for various applications including spas, swimming pools, bathrooms, and fish tanks.