[Reusable Washable]-- This Foam filter can be washed and re-used several times over. You should see a foam filter last around 2 months. [High Quality ]-- Made of quality sponge. This Foam filter with softness, repeated bending, good flexibility, high rebound. [Save Time And Money]-- Replacing your filter cartridge with paper is part of your pool's routine maintenance and its regular replacement can be expensive. These washable and reusable foam filters will reduce your costs. [Great Function]-- Sponges filter could help to cleaning particles and debris, and prolong the life of your filter media, provide efficient water flow with less clogging for long lasting filtration and cleaning. Colour:blue Material:sponge Size:10.2 x 9cm, inner diameter 3cm Package Contents: 4 * Filter Sponge Only the above package content, other products are not included. Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.