100% brand new and high quality,Reusable foam box.Suitable for Bubble and Jetted Pure-spas. for Replacement of S1 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 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.Size: 10.8x7.3 cmCenter hole drilling: Approx 4 cmMaterial:spongecolour:BluePackage Contents:18 x Filter SpongesOnly the above package content, other products are not included.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. Note: 1. Please allow 1-3 mm error due to manual measurement and 1-3g weight error make sure you don't mind before ordering. 2. Due to the lighting of the photos and the difference of monitors, the pictures may not reflect the actual color of the real item. Please make sure you don't mind before ordering, thank you! About Shipping: 1.please pay attention to your delivery address such as: name, street, house number, doorbell/email without name, etc. is correct, or the order will not be delivered correctly. 2.All items will be shipped within 3 business days after the payment is received. Most times you will receive them within 8-12 days then. The specific delivery time is depend on circumstances. 3.During the shopping process, if you have any questions, please feel free to consult us, we will reply you within 24 hours Hope you have a pleasant shopping experience!