General description This 9 Pack Replacement Trimmer Line Spools for Ryobi One + AC14RL3A includes 9 trimmer line spools and 2 covers, designed specifically for Ryobi cordless string trimmers. The spools are compatible with 18V, 24V, and 40V models, ensuring a perfect fit for your gardening needs. Technical specifications Spool diameter: Ø 1.6mm Length per spool: 30.17m Tensile strength: over 100 pounds Material: upgraded nylon polyamide Usage The automatic feed spool utilizes centrifugal force to feed the trimmer line, minimizing the hassle of manual adjustments during operation. The trimmer line is designed to be soft and flexible, enhancing cutting efficiency by 50% when in contact with hard surfaces. For optimal performance, it is recommended to apply powder to the spool to provide lubrication.