Function: Swimming pool filter sponge is used to clean impurities, leaves and pollutants in the swimming pool, so the swimming pool can be kept clean. High quality: High quality sponge makes it have ductility and can have stronger filtering capacity. However, the swimming pool contains some pollutants, so you need to take out for cleaning regularly to reduce the possibility of the filter sponge being corroded and decomposing, so as to extend service life. Cost saving: The swimming pool needs regular maintenance, and the filter elements needs to be replaced frequently to maintain cleanliness. The pool filter sponge can be cleaned so it can be reused, which helps you save a lot of costs. Easy to : You just need to take it out regularly (about a week), clean it and put it back in place. Suitable for: with foam and jet pure swimming pool, bathroom, fish tank. Type: Type B Filter Sponge Colour: Blue Material: Sponge Size: 25.5x14.5cm, inner diameter 5cm Package Contents: 1 x Filter Sponge Only the above package content, other products are not included. Note: Light and different displays may the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.