Feature: 1. Reduce Costs: Replacing paper canisters is part of routine pool maintenance and can be costly to replace on a regular basis. These washable and reusable foam filters will reduce your costs. 2. Necessary for Regular Replacement: Regular replacement and cleaning of the filter sponge is necessary to prevent the build up of algae, and other organisms that can affect water quality. 3. Strong Filtering Ability: The high filtration capacity of this filter can effectively enhance water quality and create a healthier swimming environment for its users. 4. Easy to Install and Replace: The filter is easy to install and replace, making it an essential component in maintaining a clean swimming pool. 5. Excellent Grade Materials: Made from durable PU sponge material, this filter boasts a long lifespan and can be easily cleaned and reused multiple times, making it an economical choice for pool maintenance. Specification: Item Type: Pool Filter Sponge Material: PU sponge Color: Black. Package List: 5 x Pool Filter Cotton