Amazon.com : Weed Eater String for Greenworks - Single Line Auto-Feed Replacement Trimmer Line Spool, 6 Spools & 1 Cap : Patio, Lawn & Garden
BLACK+DECKER 14 in. 7.5 AMP Corded Electric Curved Shaft 0.080 in. Single Line 2-in-1 String Trimmer & Lawn Edger with Automatic Feed GH3000 - The Home Depot
Black & Decker 40-Volt Cordless String Trimmer/Edger - Single Line Feed - 38-in L Shaft LST140C | RONA
String Trimmers
Vanon 4Pack Weed Eater String Replacement for Greenworks 20V, 40V Single Line Cordless Trimmers - Walmart.com