Amazon.com: Oregon Trimmer Head Replacement, 4-1/2-inch Speed Feed, Fits Most Straight-Shaft Trimmers (55-265) : Patio, Lawn & Garden
Amazon.com: Terre Products, Universal Trimmer Head Replacement, Bump Feed String Trimmer Head, Compatible with Speed Feed and Most Weed Eater Brands, 4 Inch Diameter, Line Size .05 Inch to .105 Inch :