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 reduce your costs. Long Working Time: Initial cost of this is slightly more than a paper yet outlast a by a . : This Foam filter outlast your paper cartridges and can be washed and re-used several times over. Reusable Washable: Advises changing a paper each week, whereas these foams can simply be washed and put back. Keep Water Clean: be a great water cleaner for swimming pool. Specifications: Fitment:For Type H Material: Sponge Color: blue Size():10.2x9cm/4.01x3.54in() Center Hole Drilled:30mm() Package Contents: 10 x Filter Sponge Only the above package content, other products are not included. 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.