Reusable Washable Filter: Changing your paper filter is part of your routine maintenance for your pool and regular replacement of the can prove costly. These washable and re-usable foam filters will reduce your costs.<br> Long Working Time: Initial cost of this is slightly more than a paper yet will outlast a by a .<br> Durable: This Foam filter will outlast your paper cartridges and can be washed and re-used several times over.<br> Reusable Washable: Advises changing a paper each week, whereas these foams can simply be washed and put back.<br> Keep Water Clean: Will be a great water cleaner for swimming pool.<br> Fitment: For Type A<br> Size(): 20x10cm()<br> Center Hole Drilled: 4cm()<br> It takes 2 hours for the compressed product to recover<br> Material:Sponge<br> colour:blue<br> Package Contents:<br> 8 * Filter Sponge<br> Only the above package content, other products are not included.<br> Note: Light 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.