Tarpaulin Tensioner: Ball tensioner includes 50pcs, the length of the cable is 150mm/5.9inch, the extreme stretch length is nearly 300mm/11.8inch. These reliable rubber harnesses ensure a secure fit to your body. your tarps and banners. High quality ball made of rubber and plastic. It is durable and friction resistant. It has great tension to fix the tarpaulin tightly. The tarpaulin tensioner is suitable for tents, posters, gazebos, trampolines, mesh banners and PVC banners. It has great tension to fix the tarpaulin tightly. It is easier to remove. Use this ball tensioner better than others, just pull out the rubber cable. put through the hole and put it on the ball. This cable has the best strong elasticity. Don't worry about your thing being so big that the cable will break. The rubber ball tensioner can be attached and removed in seconds. Plastic and rubber have high weather resistance. Adjust the length of the rubber by moving the knot.