Compatible with Ryobi OneThese replacement trimmer spools are compatible with Ryobi One cordless trimmers, including 18V, 24V and 40V trimmers Long LifeThe Replacement spool is 1.65mm in diameter and 3 meters in length, it can be used for a long time Efficiently cut weedsMade of high quality ABS spool and durable nylon line , weeds can be cut easily and efficiently Spool with threadSpool with thread design reduces air resistance for more efficient cutting, with it you can reach difficult edges to reach garden lawns 6 pieces Replacement Spools for Automatic Ryobi One + AC14RL3A-18V 24V 40V  Notes  -Unplug the power cord before replacing, installing or removing the accessory. -Always wear protective eyewear when neck pe-grass is on.  -Sharp edges, small parts out of reach of children under 3 years.  -Not suitable for other trimmers- grass. -The automatic replacement spool referred to in is the spool that comes with the hay rope itself, not a separate spool. Specification: Diameter: 1.65mm  Length: 3.35 meters (11 feet) for each roll, 20 meters (66 feet) in total Quantity: 6 Pack  Compatibility  18V  - OLT1825, OLT1825M, OLT1830H, OLT1831, OLT1831H, OLT1831S, OLT1832,   P2000, P2001, P2002, P2003, P2004, P2005, P2006, P2200, RLT1825,  RLT1825Li, RLT1825LL13, RLT1825M13, RLT1830H13, RLT1830H15,8nbsp; RLT1830Li, RLT183113, RLT183115, RLT183125, RLT1831H20,  RLT1831H25, RLT1831H25, RLT1831H25PK, RLT183213, RLT183220, RLT183225,  RLT183225PK, RLT2925&nbsp ; 24V  - RY24000, RY24020, RY24021, RY24200  40V  - RY40001, RY40021, RY40200, RY40201, RY40210, RY40210A Quantity delivered: 6 pieces