High quality material: washable sponge, the filter is made of high quality polyester fiber, good flexibility, strong rebound, strong and durable Size: diameter: 90mm;Length: 102mm;Opening: 30mm;Suitable for swimming pools and spas as well as bubble and pure jet spa pools, baths and aquariums. Inexpensive: This foam filter lasts longer than your cartridge and can be cleaned and reused multiple times.Replacing the filter element is part of the daily maintenance of the water tank.Regular replacement of filter elements can be expensive. A reusable foam filter can reduce your costsInexpensive: This foam filter lasts longer than your cartridge and can be cleaned and reused several times.Replacing the filter element is part of the daily maintenance of the water tank. Please note: it is recommended to change a box every week.This foam filter has a longer lifespan than conventional ink cartridges because it can be cleaned several times.The foam filter can be used within the last two months.