Pool Filter Cartridge Size: 88mm x 78mm. Filter cartridge for Bestway Type I. Removes Impurities: The massage pool filter is made of easy-to-clean and durable Dacron paper, your roll is to filter your pool water so that leaves, insects and dirt that settle on the surface of the pool water do not settle on the bottom of the pool. Efficient Filtration: The filter cartridge is the heart of the filtration system and ensures that your pool water remains clear and clean both on the surface and in the ground. Using highly efficient filter elements with excellent filter results will give you an excellent filtration experience. Easy to use: The pool filter core is easy to adjust, easy to replace regularly, keeps the pipes clean, and provides you with safe and healthy swimming pool water. Replacement: It is recommended to replace the filter element every two to three weeks to keep your pool or spa clean. Easy to clean Simply remove the filter from the pump and spray off the dirt with a garden