The Coleman Type B Pool Filter Cartridge is a pack of 2 cartridges designed for use in various types of pools, including above ground pools, and in ground pools. These cartridges are easy to install and clean, making maintenance a breeze. With the Coleman brand known for quality and durability, you can trust that these filter cartridges will keep your pool water crystal clear and clean. Made in Vietnam, these cartridges are a reliable and practical choice for keeping your pool in top condition.