General description This pack includes 6 replacement spools and 1 cap for Ryobi One+ brushcutters, compatible with 18V, 24V, and 40V models. The spools feature a 1.6mm diameter and are designed for easy installation and use. Technical specifications Spool diameter: 1.6mm Quantity: 6 spools and 1 cap Compatible with Ryobi ONE+ cordless trimmer models: 18V, 24V, 40V Usage Auto Feed Spool: Automatically feeds the trimmer using centrifugal force, minimizing manual adjustments. Cutting Efficiency: The soft and flexible trimmer line stretches and cushions upon hitting hard surfaces, increasing cutting efficiency by 50%. Other information