Product Description: 1. Buy together and save - two pairs of Intex type S1 spa filter cartridges! give your Intex pure spa it's best performance By using Genuine Intex brand, Easy To clean, Dacron filter material! 2. The authentic replacement cartridge for your Intex pure spa. Replace your filter cartridges regularly as every two weeks to maximize your spa's performance! 3. Product Dimensions 4.25 x 5.75 x 4.25 inches 4. The S1 Cartridge Filter is sure to keep your PureSpa Jet Massage water clean and fresh 5. It is made with easy-to-clean, heavy duty Dacron paper, for the ultimate filtration 6. For maximum efficiency, clean cartridges each week and replace once a month or sooner -Part #: 29001E -Material Dacron Compatible with: for Intex B01HMXBDGM PureSpa Type S1 Note: All manufacturers' names and part numbers remain the property of their respective holder(s) and are used for compatibility information only.