Tarpaulin Tensioner: The ball tensioner contains 50 pieces, the cable length is 150 mm/5.9 inches. The extreme expansion length is nearly 300 mm/11.8 inches. These reliable rubber harnesses provide a secure hold for your tarpaulins and banners. High-quality rubber and plastic ball. It is durable and friction-resistant. It has a large tension to firmly fix the tarpaulin. The tarpaulin tensioner is suitable for tents, posters, pavilions, trampolines, mesh banners, PVC banners. It has a large tension to firmly fix the tarpaulin. This ball tensioner is easier to use than others. Simply pull the rubber cable through the hole and place it on the ball. This cable has the best elasticity. Don't worry if your object is 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.