Replacing the paper filter element is part of daily tank maintenance. Replacing a conventional filter element can be very expensive. These washable and reusable foam filters will reduce your costs. The initial cost of this cartridge is slightly higher than the tray, but it takes a long time to survive in the cartridge. This foam filter can survive in the cardboard and can be washed and reused several times. It is recommended to replace one cardboard per week, and these foams can be easily cleaned and replaced. You should see the foam filter last about 2 months. All you have to do is remove the filter when you hit the electrode rod, as excessive chlorine will cause the foam to quickly break down. Normal disinfection levels of chlorine and bromine are good, and these foams have been tested at normal levels. Product Description Size: B: 108*40*73MM Sizes - Pool Filter - Foam - Reusable - Washable - Sponge CartridgeColor: Blue (slight color difference). Size: A: 100 x 40 x 200 mm, 24.8 g. B: 108 x 40 x 73 mm, 11.8 g. C: 93 x 30 x 102 mm, 11.2 g. Contents: 1 x Swimming Pool Filter Sponge. Reusable foam box. Suitable for Intexfilterpumps, model ONEfilter. Replaces the One type paper tray. Note: 1. The actual color of the project may be slightly different from the color displayed on the website, which is caused by many factors such as brightness and brightness of the display. 2. Please vary slightly from the measurement data. 3. Please allow 1-3 cm error.