【Compatible with Various Ryobi Cordless Brush Cutter Models】This brush cutter replacement spool is compatible with Ryobi ONE+ cordless brush cutter models: 18V, 24V, 40V. 【Automatic Feed Spool】The Eventronic Weed Wacker replacement spool for Ryobi Weeder is easy to use, automatically feeds the brush cutter via centrifugal force, reducing the hassle of having to manually sort the replacement spool while working. 【Wear-Resistant】The Eventronic replacement spool for Ryobi brush cutter is made of improved polyamide nylon with a tensile strength of over 100 lbs, 30% stronger than other brands and longer life. 【Cutting Efficiency】The Eventronic replacement spool for Ryobi brush cutter is soft and flexible, allowing the line to stretch and cushion when used. It is resistant to strong surfaces and increases cutting efficiency by 50%, allowing each spool to cut more weeds. 【Professional Seller】As a professional brand, we have an excellent after-sales service and product quality assurance team.