Yale Bee Line eye is a popular friction hitch cord for professional arborists. Yale Bee-Line is constructed of a blend of Vectran, Polyester and Technora. It has one of the highest melting points of any friction cord available. Combined with the high strength and heat resistance of the Vectran core (620 degree melting point), Bee Line is unbeatable for long life and performance. Features a 75% Technora (900 degree melting point) 25% Polyester (480 degree melting point) sleeve. 8mm Bee Line works best with 7/16" (11mm - 11.7mm) climbing rope. Made in the USA.