Compatibility & Design: Specifically engineered as a dual line replacement spool for Weed Eater and compatible with Greenworks 2900719, ensuring a precise fit and optimal performance. Easy Installation Process: Hassle-free assembly; simply turn off the trimmer, remove the cap, snap the new spool in place, and secure with the cap cover. High Quality Flexibility: Constructed from durable twisted copolymer nylon resin, offering superior flexibility and resistance against wear and tear. Package Includes Cap Covers: Comes with 4 x String Trimmer Spool Line and 1 x Cap Cover, ensuring everything you need for a smooth operation is at your fingertips. Synthetic Trimmer Edger Line: Engineered for both trimming and edging tasks, this line provides versatile use and excellent results. Ensure your dual line string trimmer operates at peak efficiency with our premium replacement spools, designed for Weed Eater and perfectly compatible with Greenworks 2900719. Engineered with high-quality twisted copolymer nylon resin, these spools offer exceptional flexibility and durability, making them ideal for rigorous outdoor tasks. The easy install automatic winding feature makes changing spools a breeze, saving you time and effort.