Tarpaulin Tensioner: Ball tensioner contains 75 pieces, the length of the cable 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 tarpaulins and banners. High quality rubber and plastic ball. It is durable and friction resistance. It has a large tension to firmly fix the tarpaulin. Tarpaulin tensioner is suitable for tents, posters, pavilions, trampolines, mesh banners, PVC banners, It has a large tension to firmly fix the tarpaulin. It is easier to use this ball tensioner than others, Just 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 by a few seconds. Plastic and rubber have great weather resistance.Adjust the length of the rubber by moving the knot. Note: The data are all measured manually, please allow 1-3cm error