Premium Material: Made of high quality sponge, ensuring eco-friendly and no pollution to water or environment. With strong durability, it is not easy to break, providing long-term use. Reusable: The replacement filter sponge features excellent elasticity and ductility, allowing multiple uses and extended service life, effectively reducing pool maintenance costs over time. Washable: Easily clean the filter pump cartridge with a mixture of warm soapy water and rinse with water, ensuring convenient maintenance and prolonged efficiency. Efficient Filtration: This replacement sponge filter foam effectively cleans particles, debris and a variety of impurities, including hair, sand, dust and leaves, ensuring always clean water. Application: With dimensions of 3.1 inches in height and 2 inches in inner diameter, this replacement sponge filter foam is suitable for various applications, including spas, swimming pools, bathrooms and aquariums. Note: The data are all measured manually, please