Compatible With Ryobi One Plus+ 18V 24V 40V Electric String Trimmer Ry40204 Ry40220 Zrp2080. Replaces Ryobi One Plus+ Spools With Cnc Machine To Cut And Wind, Automatic Line Change. Manual Winding Is Complicated And Can Be Easily Snagged During Use, Which May Damage The Line Cutter. High Quality Abs Spool And Durable, Flexible And Long Life Polyamide Nylon Line. Use Centrifugal Force And Aerodynamics To Reduce Air Resistance For Fast Cutting. ItS Easy To Remove The Old Cartridge And Replace It With A New Pre-Wound Cartridge. This Quick And Easy Solution Is Ideal For All Ryobi Cordless Trimmers With An Automatic Feed Head (Single Line). 100% Satisfactory Service, , Please Email Us Mail. We Will Solve It For You At The First Time. See More Details. ,