Keep your pool water crystal clear and refreshing with the Bestway Filter Cartridge (I). Designed to fit perfectly in your pool system, these two blue and white cartridges measure 8.0 cm x 9.0 cm and are engineered for optimal filtration. Easy to install and replace, they effectively trap dirt and debris, ensuring a clean swimming environment for you and your family. Upgrade your pool maintenance routine today and enjoy a worry-free swim all season long!