and high quality,Reusable foam box.<br> Suitable for Bubble and Jetted Pure-spas. for Replacement of S1 carton.<br> Replacing the filter of paper filter is part of the daily maintenance of the pool. These cleaning and reusable foam filters will reduce your cost.<br> The initial cost of the is slightly higher than that of the , the life is for a long time.<br> More durable than the carton, and it can be washed and reused many .<br> Size: 10.8x7.3 cm<br> Center hole drilling: 4 cm<br> Material:sponge<br> colour:Blue<br> Package Contents:<br> 18 x Filter Sponges<br> Only the above package content, other products are not included.<br> Note: Light 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.<br> Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Sold by-YJL official store