*100% brand new and high quality *Reusable foam box*Suitable for Intex Bubble and Jetted Pure-spas*Replacement of S1 carton*Replacing the filter element of paper filter is part of the daily maintenance of the pool. These cleaning and reusable foam filters will reduce your cost*The initial cost of the cartridge is slightly higher than that of the cartridge, but the cartridge life is longer for a long time*More durable than the carton, and it can be washed and reused many times.*Material: Sponge*Color: Blue(As Pictures Show)*Quantity: 1pcs*Size: 10.8*7.3 cm(Approx)*Center hole drilling: 4 cm(Approx)   Package Contents:   1*Filter Sponges