Compatibility: Compatible with Ryobi One + AC14RL3A. Suitable for several models of Ryobi cordless edgers: 18V, 24V, 40V. Premium Material: The aftermarket thread trimmer spool line is made of high quality ABS material. Not easy to break supports fast cutting and longer life. Convenience and high efficiency: Flexible and strong cord for cutting. Allowing the line to stretch and cushion impact on hard surfaces, the aerodynamic shape allows less drag for more efficient cuts. Auto Feed Replacement Spool: Compatible with the Ryobi trimmer and uses centrifugal force to feed the cutting line as needed. With the automatic loading system, the replacement spool makes the job easier tedious manual winding reels. Package Include: 6 Packs of Replacement Thread Trimmer Line Spools are packed in one pack for you. 11 feet in length and 0.065 " in diameter.