Universal Compatibility with CMZST0653 Models : Precisious-engineered to fit a wide range of weed eater models, including CMCST900, CMESTA900, CMESTE920, CMZST98020, CMCST915, CMCST900D1, and CMEST913 Series. Ideal replacement for string models CMZST065 & CMZST0653 and Cap model CMZST120SC. compatibility by verifying your model. Enhanced Material - Nylon + Glass Fiber : Our premium PA6 Nylon is enhancing stiffness and heat resistance. This advanced material composition ensures the weed trimmer line remains intact at high RPMs, minimizing breakage and extending usability. Experience industrial-grade durability right in your backyard. Pre-Wound Spools for Easy Installation : Each spool is meticulously factory-wound to prevent tangles and smooth feeding. The aerodynamic design of reduces air drag, enabling quieter operation and cleaner cuts, while maximizing motor efficiency. Simplify your yard work with our ready-to-use spools. Optimized Auto-Feed System : Designed for seamless integration, our string trimmer line guarantees performance with automatic feed systems. The snap-fastening cap keeps the spool securely in place, reducing vibrations and enhancing cutting efficiency by 40%, allowing for uninterrupted yard maintenance. Superior Tensile Strength for Tough Jobs : With a diameter of 0.065 inches and a length of 30 feet, our weed string boasts a tensile strength exceeding 100 LBS. It's 40% tougher than standard strings, capable of handling thick grass and heavy weeds, ensuring durability and flexibility for demanding tasks., Weight: 0.661386786 pounds, Manufacturer: Xnuiasqe