UL classified to meet NFPA 1983/2006 edition rope standards. Durable 16 carrier sheath construction has a 50/50 ratio of core to sheath for long wear. Solution dyed polyester sheath, nylon core. Elongation @ 300 lbf. = 3.1%, 600 lbf. = 4.9%, 1000 lbf. = 7.4%. Colors: orange, blue, yellow, red, fluorescent green, solid black. Tensile strength: 9666lbf. Working load limit: 644 lbf. Weight per 100 feet: 7.4 lbs.