The diameter of the umbrella rope is 3 mm, and the tension of the single rope is about 220 kg. The monochromatic bracelet has a total length of about 3.5 meters to 3.8 meters, and the double-color bracelet has a single rope of about 1.8 meters. 1.2-meter belt Unpacked with two 20-meter 550 ropes for trailers and first aid. The materials used are all special for umbrella ropes, and they are the same as the ropes used for seagoing vessels. They have the advantages of corrosion resistance and anti-aging.