Hayward's reusable cartridge elements are made of a superior reinforced polyester material, that provide a high degree of water clarity and longer filter cycles. This genuine replacement cartridge is the number one choice in cartridge filtration to maintain your pool water cleanliness, and clarity. Cartridge works with Star Clear Plus Filter, Model # C3025. Features: High-quality, reinforced polyester elements provide maximum filtration area and easily trap dirt and debris Precision-engineered extruded core design provides maximum water flow while reducing energy cost Consistent with Hayward high quality and compatible with all Hayward specified chemicals Individually packaged with the Hayward name on end caps and plastic wrap to identify as genuine Hayward parts Diversified sizes to meet both above-ground or in-ground cartridge filter applications