Kosto 5/8” Vertical Lifeline. 50 Foot. Made of 5/8″ polyolefin. Locking hook at one end and sealed at the other. UV, abrasion and mildew resistance. Capacity 310 lb. Percentage of elongation under an 8 kN (1800 lbs) load, wet and dry 10%. Tensile strength with termination NBS 6000. ANSI Z359.15 approved.