[Premium]The swimming pool filter foam are made of high quality 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 service 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 cartridge 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,save you lots of time and efcompatible witht[compatible with intex sponge pool filters type D/VII]This pool filter cartridge is compatible compatible with Bestway VII,compatible with Intex Type D swimming pool and spas.Fits compatible with most filters,It is designed compatible with use with compatible with Intex/bestway filter pump.[Replacement]This Foam filter will outlast your paper cartridges and can be washed and re-used several times over.Advises changing a paper cartridge each week, whereas these foams can simply be washed and put back. You should see a foam filter last around 2 months.colour: blueMaterial: spongesSize: 9.5x5.2x10.8cmPackage Contents:4 x filter spongesOnly 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.