Usage Tips:AC14HCA Spool Cap for Ryobi One+ 18V, 24V, 40V cordless strimmers. AC14HCA Replacement Spool Cap replace part numbers: 522994001, 993373001, 3411546-7G, HM3411546BG, 341156AG, 3411546CG and 3411546BG.Spool Cap replacement for ryobi weed eater parts compatible with Ryobi 18V String Trimmer P2000, P2001, P2002, P2003, P2004, P2005, P2006, P2200, P2006A; 24V Cordless Trimmer / Edger: RY24000, RY24020, RY24021, RY24200; 40V String Trimmer / Edger: RY40001, RY40021, RY40200, RY40201, RY40210, RY40210A.Replacement spool cap for a RYOBI cordless auto-feed trimmer. Grass Trimmer Spool Cap for ryobi made of high quality ABS, durable for use. 522994001 Replacement Spool cap protects string trimmer line fixed spool, prevent weeds from getting stuck inside, avoid damage to the trimmer.Easy to install,no tools needed to install,Simply unhook the old cap and this can be snapped in place over spool line, ready to go in seconds.Colour:greyMaterial:ABSPackage Contents:6 x Cap CoversOnly the above package content, other products are not included.Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.