Ryobi Trimmer Line Spool: Ryobi One+ AC14RL3A 18V, 24V, 40V Trimmer Line, 11ft/0.065" Diameter. Premium Quality: The replacement trimmer line spool is made of high-quality ABS. It won't break easily, ensuring quick cutting and longer life. Convenience and High Efficiency: Flexible and durable cutting line. By allowing the line to stretch and cushion the impact on hard surfaces, the streamlined shape allows for less resistance for more efficient cutting. Replacement Spool with Automatic Feed System: Compatible with Ryobi trimmer lines, it uses centrifugal force to feed the trimmer line as needed. If you want the automatic feed to work better, the suggested solution is to apply powder to the spools, which provides a small amount of lubrication. Package Includes: 6 packs of replacement trimmer line spools and 2 packs of replacement caps are packaged in one package. The spool is 3.3 meters long and has a diameter of 0.165 mm, and the cap is compatible with the replacement spool.