Samson ArborFreak™ 16-strand arborist line has a core and cover that are engineered to work seemlessly together to offer abrasion resistance and a stabilized core for high strength and low stretch. The rope offers superior firmness for all climbing techniques. The 12mm (1/2") diameter rope provides an excellent grip, knot holding capability, and low stretch. Available in color options for high visibility when multiple lines are used at once. Tech specs: 7.7 lb per 100ft, 8100 lb Tensile Strength, 810 lb Working Load, Nylon Core with Polypropylene-Polyester Blended Cover. 1/2 x 120ft in Redwood Color