Review on 50-Pack Black Ball Bungee Cords - Heavy Duty Elastic String for Quick Fastening of Canopy, Tarp, Ball Net, Straps, Tent, Poles, Wires, and More! by Tim Sterling

I use these (all black) bungee cords for a variety of purposes. For example to hold the trunk of my car if it won't close if there is too much cargo in it. I also used twine to attach par style lights around the tree trunks at night to help blend them into the landscape. They appear to be of medium strength, but I only use them on lighter items.