... 5.0mm Matrial: 100% Nylon 6 Color: Any color Trimmer Line (Trimmer Line; Mowing Line; Brush Cutter Line; Nylon Line) ... . Shape:round, trigon, square,star,hexagon,heptagon,twist,saw blade ,etc Packing:Card Head:15M(50ft), Blister: 15M(50ft); ... -resistant performance 4, Directional aerodynamics always presents the cutting blade forward 5, Premium copolymer formulation for commercial toughness 6 ...