Compatible with Multiple Ryobi Cordless Corded Trimmer ModelsThis corded trimmer replacement spool is compatible with Ryobi ONE+ Cordless Corded Trimmer Models: 18V, 24V, 40V. Automatic Feeding SpoolThe Eventronic Weed Wacker line replacement for Ryobi Weeder is easy to use, it automatically feeds the trimmer by centrifugal force, reducing the pain of manually sorting out the spare spool while working. Wear ResistantThe Eventronic corded trimmer replacement for Ryobi weed eater is made of upgraded polyamide nylon with a tensile strength of over 100 lbs, 30% more durable than other brands and longer life. Cutting Efficiency Eventronic weed line for Ryobi weeder replacement is soft and flexible, allowing the line to stretch and cushion when it is hit by hard surfaces, and increases cutting efficiency by 50%, allowing each spool to cut more weeds. Professional SellerAs a professional brand, we have an excellent team after-sales service and product quality assurance. Package contains 9 Ryobi strings, 2 spool caps. If you want better autofeed, the suggested solution is to apply some powder to the spool, which will provide a small amount of lubricant.< /p>