Save Costs - Regular replacement of the paper filter cartridge is part of daily pool maintenance, it will lead to increased costs and waste. Our reusable and wasble foam filters are an ideal replacement for disposable filter paper! You don't need to replace the filter sponges frequently. Good Filtering Effect - Our Foam Filter Cartridge s a high-density mesh structure tt can filter a lot of impurities in the swimming pool, it can remove leaves, grass, ir, slag, pine, insects and other floating debris effectively. High Quality - Our Pool Filter Foam is made of high-quality sponge, the thickness is sufficient, the density is moderate, soft, not easy to deform, environmentally friendly, wasble, reusable, durable, s a long service life, perfect for S1 type filters. Reusable & Wasble - Each Spa Foam Filter can be used for about 2 months. You can clean the filter sponges once a week to keep the water clean and reduce bacteria in the swimming pool, our filter element is easy to clean and install. Application - Our wasble foam filter is suitable for most swimming pool filters on the market, keep the swimming pool,and spa clean. Features: 1. The density of our foam filters is moderate, the water permeability is also very good, it is very thick, not easy to foam, it can filter a lot of impurities in the swimming pool. 2. We strongly recommend tt you wash the filter element once a week. The service life of the product will be affected by the filter performance, water temperature and other factors. Features: Size: 10.8 x 7.3 x 4 cm. Material: sponge. Package includes: 4 x Swimming Pool Filter Foam