This product is indoor pool filter sponge, made of sponge material, with simple design and practical function. It has simple installation method and is easy to use, which can bring convenience to your replacement work. This is very good filter accessory that will bring you good experience. Features -Color:Blue -Material:Sponge -Size:10.50X10.50X8.00cm/4.13X4.13X3.14in - The filtering sponge is safe and durable, and can serve you for long time. - The swimming pool filtering sponge is easy to use, breathable, can bring you convenience. - With scientific design and practical functions, it can effectively keep your and fresh. - It is made with excellent craftsmanship, stable and reliable, and will serve you well. - Easy to replace, simple to operate, can easily use the filter sponge, excellent filtering effect. Package list: 12 x Pool Filter Sponges