AYK1000: Features: -Trimmer line.-Replacement line for all gas and electric trimmers, including Ryobi, John Deere, Echo, Stihl, Homelite, Bolens, Weedeater, Craftsman, Toro, Cub Cadet, Troy Bilt, Honda, Poulan, Black and Decker, and most other makes.-Superior wear formulated using the highest quality copolymers to provide maximum line life.-5 cutting edges.-Directional aerodynamics always presents the cutting blade forward.-Extra clean cutting minimizes browning of cut grass tips.-Processed to minimize line split and frays.-20 to 30pct more rigidity for diamond like cutting performance. Construction: -Outstanding toughness engineered for ultimate impact resistance. Dimensions: -Dimensions: 0.155'' x 21''.