... square,star,hexagon,heptagon,twist,saw blade Color: Any color Nylon Trimmer lineQuality Grade:Economic Grade, Commercial Grade, Professional Grade.Diameter ... donut ,etc Feature:1,Suitable for most leading trimmers and brush cutters2,Outstanding impact toughness3,Ultra weld-resistant performance4, Directional ... noise7,Added rigidity for improved cutting8,Accept OEM orders Nylon Trimmer Line