Cost saving - Regularly replacing paper filter cartridges as part of routine pool maintenance can lead to increased costs and waste. Our reusable and washable foam filters are the ideal alternative to disposable filter paper! You don't need to change the filter sponge as often. Good filtration - Our foam filter cartridges have a high density mesh structure that filters out many of the impurities in your pool, it effectively removes leaves, grass, hair, slag, pine, insects and other floating matter. High quality - Our pool filter foam is made from high quality sponge, thick enough, medium density, soft, non-deformable, environmentally friendly, washable, reusable, durable and has a long life span, ideal for S1 filters. Reusable and washable - Each spa foam filter lasts for approximately 2 months. You can wash the filter sponge once a week to keep the water clean and reduce bacteria in the pool and our cartridges are easy to clean and install. Applications - Our washable foam filters fit the S1 model and most pool filters on the market, keeping pools, aquariums and spas clean. Do you want to save the huge cost of cleaning your pool? Is it still difficult to find a suitable filter sponge to replace disposable pool filters? With foam filter cartridges you can solve these problems, they are easier to clean and most importantly reusable, which can actually reduce costs. Good filtration Our foam filter cartridges have a high density mesh structure that filters out many of the impurities in your pool, it effectively removes leaves, grass, hair, slag, pine, insects and other floating matter. Cost savingOur sponge cartridge filters are reusable and washable, resulting in significant savings compared to traditional filters. High density mesh constructionHigh quality spongeGood elasticity Features: 1. Our foam filters are moderately dense and have good water permeability, are thick and do not bubble easily, and can filter large amounts of impurities from the pool. 2. We strongly recommend that you clean the filter cartridge once a week. The life of the product will be affected by the performance of the filter, water temperature and other factors. Size: 108*40*73MM Material: Sponge Package includes: 6 pool filter foams