General description This 6 Pack Replacement Spools for Ryobi One+ AC14RL3A String Trimmer is designed for use with Ryobi's 18V, 24V, and 40V cordless lawn mowers. The spools feature an automatic feed system that utilizes centrifugal force, making it easy to replace the line without manual adjustments. Technical specifications Spool Diameter: 1.6 mm Length per spool: 20.11 m Package includes: 6 spools and 1 cap Compatibility and accessories Compatible with Ryobi ONE+ cordless lawn mower models: 18V, 24V, 40V Usage Designed for efficient cutting, the trimmer line is soft and flexible, enhancing cutting efficiency by 50% when hitting hard surfaces. Other information Made of enhanced polyamide nylon for wear resistance. Durability: Over 100 lbs of pull, 30% more durable than other brands.