[High Quality ]-- Made of quality sponge.This foam filter with softness, repeated bending, good flexibility, high rebound. [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. [Product Dimensions ]-- 20cm length x 10cm outer diameter x 4cm inner diameter. [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. [Reusable Washable]-- This Foam filter can be washed and re-used several times over. You should see a foam filter last around 2 months.<br><br>Colour:blue Material:sponge<br><br>Package Contents: 3 * Filter Sponge