Cartridge 13.6 x 10.6 cm. Sold in packs of 2 pieces. The filter cartridge is the heart of the filtration system and functions to keep the water in your swimming pool clear and clean, both on the surface and at the bottom. It filters debris such as leaves, insects, and dirt from the pool water, preventing them from settling at the bottom. This helps the filter pump operate more efficiently. Keep your pool water clean and clear with Type II filter cartridges. This cartridge has a diameter of 10.6 cm and a height of 13.6 cm, and is designed for use with filter pumps rated at 2006 L and 3028 L per hour. The cartridges are easy to clean and effectively capture debris during filtration. Bestway recommends replacing the cartridge every 2 weeks for optimal performance. Package includes 1 cartridge.