Keep your pool water clear and clean with the Filter Cartridge (Type II) from Bestway. This replacement cartridge measures Ø4.2'x5.4''/10.6cmx13.6cm in and is designed for 530 and 800 gallons per hour filter pumps. It's easy to clean dirt and debris from your pool with your pump. Bestway recommends replacing them every two weeks for best results. Filter Cartridge (II) * Replacement Cartridge: 220-240V ~/12V ~ 2,006 L (530 Gal.) and 3,028 L (800 Gal.) * Easy to clean Contents: 2 filter cartridges Made in China