Compatible Models: Spool model 2900719, Cap cover model 3411546A-6, compatible with Greenworks string trimmer models 2101602 and 2101602A. High Quality: ABS spool and durable polyamide nylon line, flexible design. Aerodynamic shape reduces drag for more efficient cutting. Features an auto-feed system that eliminates the need for hand-winding, making spool replacement quick and easy. Size: Cordless grass trimmer spool with a line diameter of 0.065 inch, designed to fit the line hole precisely. Spool line length is 20 feet, providing extended mowing range. Easy to Use and Install: No cap cover required. Automatic winding mechanism allows fast spool changes, saving time and effort. Precautions for Use: Always wear safety goggles and long pants when operating the trimmer to protect against flying debris. This replacement spool is intended for use on young, light vegetation. For thick or woody weeds, use appropriate cutting tools. Installation Instructions: 1. Turn off the trimmer and remove the spool cap. 2. Insert the new spool into the head. 3. Snap the line into the slot and align with the retainer. 4. Reattach the cap securely. Color: Black, Gray, Green Material: ABS, Nylon Package Contents: 4 x String Trimmer Spool Lines 1 x Cap Cover Note: The package includes only the items listed above. Other accessories are not included. Note: Lighting and display settings may cause slight color variations between the image and the actual product. Measurement error is +/- 1-3 cm.