MORE DURABLE THAN TRADITIONAL FILTER CARTRIDGES This is a great replacement for cardboard pool filters. Pool filter cartridges good value for money to see over time if the spa let's say the motor does not clog up. All we had to do was cut these foam filters to the right size, which is no problem with a good cutter, and replace the usual paper pool filters. HIGH QUALITY Foam Pool Filters approx 108 x 73mm (L x W). The foam pool filters are made of high quality sponge. As these pool filter cartridges are washable they are economical, this foam filter lasts longer than cartridges and can be cleaned and reused multiple times. Highly stretchable and compressible these pool filter foams fit many aquariums, spas or swimming pools. REUSABLE The Pool Filter Sponge The big difference is that the Pool Filter Sponge is much easier to clean. you still have to follow the spa maintain it every day not wait for the foam filter to turn yellow and that it remains in good general condition. Each Foam Pool Filter for Spa can be used for about 2 months. EFFICIENT FILTRATION The Filter Sponge can be twisted and rubbed without risking damage, Good elasticity, strong tensile force, high filtration rate, Our Foam Filter Cartridge has a high-density mesh structure which can filter out a lot of impurities in the pool, it collects all impurities, mosquitoes, strands, grass, hair and floating insects effectively. Note: The data is all measured manually, please allow error 1-3cm, due to the light and display difference, there will be some color difference, the actual object received shall prevail.