Tarpaulin tensioner: ball tensioner contains 50 pieces, the cable length is 150 mm/5.9 inch. The extreme expansion length is almost 300 mm/11.8 inch. These reliable rubber harnesses provide a secure hold for your tarps and banners. high quality rubber and plastic ball. It is durable and friction resistance. It has great tension to secure the tarpaulin firmly. Tarpaulin tensioner is suitable for tents, posters, pavilions, trampolines, mesh banners, PVC banners, It has great 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 strong elasticity. Don't worry about your thing being so big that the cable will break. Rubber ball tensioner can be attached and removed in seconds. Plastic and rubber have great weather resistance. Adjust the length of the rubber by moving the knot.