Type II Cartridge Filter for Bestway Pool Pumps is the replacement part you need to keep your pool clean with the Flowclear Type IV filter cartridge. This replacement cartridge measures 14.2 cm x 25.4 cm and is designed for filter pumps that process 9,463 L per hour. They are easy to clean and sift dirt and debris from the pool with the pump. We recommend replacing the cartridge every 2 weeks for the best cleaning and clarity results.