[Compatible With sponge pool filters type A]Fits Compatible With most filters,It is designed Compatible With use with Compatible With filter pump models: A/603/604/G,637R/638R/G,635T/636T/G.[ Material]The swimming pool filter foam are made of sponge,can be washable,re-used and can be use long time. The sponges are made of environmentally friendly material,it will not pollute the water as well as the environment.[Effective to clean]the sponge spa filter cleaner has advantages of low cost and long life; and the foam filter sponge can be cleaned many times and reused, which can reduce your maintenance costs.[Save time and efCompatible Witht] changing the pool filter is part of regular maintenance Compatible With pool,this reusable washable hot tub cleaner tool is much easier to clean and maintain than traditional paper filters, lots of time and efCompatible Witht.[ment]This Foam filter will outlast your paper cartridges and can be washed and re-used several times over.Advises changing a paper each week, whereas these foams can simply be washed and put back. You should see a foam filter last around 2 months.color:BlueMaterial:spongesize:20 x 10cmPackage Contents:6 x filter sponges