Reusable filter cartridges,washable swimming pool filter foam sponge cartridge for type b;Reusable Washable Filter: Changing your paper filter cartridge is part of your routine maintenance for your pool and regular replacement of the cartridge can prove costly. These washable and re-usable foam filters will reduce your costs. Specifications: *Suitable for filter pumps using the type B cartridge *Replaces the B type paper cartridge *Material: Sponge *Color: Blue(As Pictures Show) *Size:14.5*4.5*25.4cm(Approx) Package Contents: 1 * Filter Sponge Note: 1. The real color of the item may be slightly different from the pictures shown on website caused by many factors such as brightness of your monitor and light brightness. 2. Please allow slight manual measurement deviation for the data. *Made of high quality material, hard-wearing and practical to use. *Long Working Time: Initial cost of this cartridge is slightly more than a paper cartridge yet will outlast a cartridge by a long way. *hard-wearing: This Foam filter will outlast your paper cartridges and can be washed and re-used several times over. *Reusable Washable: Advises changing a paper cartridge each week, whereas these foams can simply be washed and put back. *Keep Water Clean:Will be a great water cleaner for swimming pool. You should see a foam filter last around 2 months.