Shop name:Chong Qing Shuo Yue Ke Ji You Xian Gong Si Product Description: and high quality Reusable foam box Suitable for Bubble and Jetted Pure-spas for Replacement of carton Replacing the filter elements 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 of the cartridge, but the cartridge life is for a long time More durable than the carton, and it can be washed and reused many . Specifications: : 2pcs colour:blue Material:sponge size:10.8*7.3 cm Center hole drilling: Approx.4 cm Package Contents: 3*Filter Sponges Only the above package content, other products are not included. Note: Light and different displays may the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.