Amazon.com : AC80RL3 String Trimmer Replacement Spool Line 080 Inch Twisted Line Compatible with Ryobi One Plus+ AC80RL3 18v, 24v, and 40v Cordless Trimmers ,Weed Eater String Auto-Feed Spool Line 11ft(8-Pack) :
RYOBI How to Re-Spool/Re-String 18V WEED WHACKER - YouTube
AC14RL3A .065" Line String Trimmer Replacement Spool for Ryobi One+ 18V,24V,40V Cordless Trimmers (8 Spool + 1 Cap) - Walmart.com
Amazon.com : EAONE 10 Pack String Trimmer Line for Ryobi Weed Wacker String, 0.065" Weed Eater String Auto-Feed Spools Compatible with Ryobi One+ AC14RL3A 18v, 24v, and 40v Cordless Trimmers with Storage
RYOBI ONE+ 0.065 Spool (3-Pack) AC14RL3A - The Home Depot