4Pcs Spool Caps for Ryobi One+ 18V 24V 40V Grass Trimmer AC14HCA Replacement Spool CapMade from ABS, known for its durability and strength, it is suitable for the wear and tear of lawn trimming tasksCompatible with Ryobi One+ Cordless Trimmers, suitable for Ryobi One+ 18V, 24V, 40V, RY40204, RY40220, ZRP2080, etc.It protects the spools on your lawnmower and securely fastens them to the trimmer, protecting your spools from damage Tool-free installation, press the spool cap, and rotate it to the appropriate position according to the arrow to lock it, very convenient and quickSpecifications:Part number: AC14HCAMaterial: ABSSpool cap size: 33 x 75mmPackage included:4 x Spool CapsOther things not included