Description:Simply place the sponge in a sink, bathtub filled with water, and the sponge will help you clean the sink yourself without any other difficult setup and absorb a lot of unwanted stuff in the water.The pool foam filter sponge has good flexibility, high resilience, can be bent repeatedly without deformation and damage, durable. It helps remove scum that forms in the water.It is made of sponge, which is a washable and reusable material.The filter sponge available in 3 sizes.It is suitable for spa swimming pool, bathroom, fish tank, etc.Item Name: Filter SpongeMaterial: SpongeFeatures: Reusable, Efficient, PracticalSize Details: S: 10cm x 7.3cm/3.94" x 2.87", Bore Diameter: 4cm/1.57" (Approx.)M: 10.2cm x 9.3cm/4.02" x 3.66", Bore Diameter: 3cm/1.18" (Approx.)L: 20cm x 10cm/7.87" x 3.94", Bore Diameter: 4cm1.57" (Approx.)Notes:Due to the light and screen setting difference, the item's color may be slightly different from the pictures.Please allow slight dimension difference due to different manual measurement.Package Includes:1 x Filter Sponge