Sturdy Materials: The reflect cord is able to withstand a load of up to 440 lbs (220 kg), which is made of polyester, lightweight reflective material and high quality nylon. It is strong and durable even in harsh weather conditions Guy Size: Each reflect cord is 4 meters long and 3mm in diameter. Package includes 4 reflective guy ropes and 4 guy rope adjusters (used for tent rope connection and length adjustment) Premium reflective and high visibility: reflective material prevents possible injury such as tripping over the rope at night, each tent guy rope has an aluminum guy rope adjuster which can adjust the length of the rope according to your actual needs Portable and lightweight: 4 reflect cord only contain 100 g, they can be placed in your tent bag or backpack Wide application: reflect cords are perfect for tent guy lines, hanging tarps, hammocks or clotheslines. It's also the essential gear for the trail, camping, waterways, highways, adventure, and more.