Experience crystal clear pool water like never before with our DL111 Swimming Pool Filter Cartridge! This pack of 4 cartridges is designed for use with both the DL19 and DL20. A best-in-class solution for maintaining optimal purity and cleanliness, it works tirelessly to filtrate, circulate and keep your pool water sparkling clean. Easy to install and replace, these filter cartridges ensure longevity of your swimming pool systems. Make a splash in the pool, safe in the knowledge that the DL111 is keeping your water pristine!