General description The 18 Pack Trimmer Line Spool is designed for compatibility with Black and Decker string trimmers, specifically models A6481 and A6485. This package includes 12 trimmer lines, 3 covers, and 3 springs, providing everything you need for efficient lawn care. The automatic spool feed system allows for easy use, as it feeds the trimmer line automatically through centrifugal force, eliminating the need for manual adjustments during operation. Technical specifications Trimmer line diameter: 1.65 mm Tensile strength: over 100 lbs Durability: 30% more durable than other brands Usage Compatible with BLACK+DECKER grass trimmers Increases cutting efficiency by 50% Pliable and flexible design allows the line to cushion impacts with hard surfaces