[ ]-- Made of quality sponge. This foam filter with softness, repeated bending, good flexibility, high rebound. [Product Dimensions ]-- 20cm length x 10cm outer diameter x 4cm inner diameter. [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. [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>Material:sponge colour:Black<br><br>Package Contents: 2 x Filter Sponge<br><br>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.