1. Premium Material: The pool filter cartridge 89x79x45Mm is made from premium material. 2. Easy to Replace: The pool filter cartridge is easy to clean and to replace when necessary. 3. Practical in Use: The pool filter cartridge is compatible with filter pump item number: 28601/28602. 4. Small Tip: You should replace the filter cartridge every 2 weeks for best results. 5. Convenient Filter Cartridge: The pool filter cartridge requires no assembly to be perfect in use. High quality replacement filter cartridges keep your easy set or metal frame pool crystal clean. The replacement cartridges are super easy to clean and maintain. The pool filter cartridge is designed for use in the cartridge filter pump models 28601 & 28602 used on the following pools: 28125EH easy set ocean reef pool, 28111EH easy set pool, 28121EH easy set pool, & the 28201EH metal frame pool. Colour: White + Blue Material: Polyurethane ‖ + Non-woven Fabric Size: 89x79x45Mm Package Contents: 12 x Pool Filter Cartridge Only the above package content, other products are not included. Note: Light reflection 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.