High quality: Ball tensioner is made of high quality nylon, rubber and plastic ball. It is durable and friction resistance. It has great tension to firmly fix the tarpaulin. Tarpaulin tensioner is suitable for tents, posters, pavilions, trampolines, mesh banners, PVC banners, It has great tension to firmly fix the tarpaulin.< /p> Reusable: 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. Ball tensioner – ball tensioner contains 30 pieces, the cable length is 200 mm/7.9 inch. The extreme expansion length is almost 400 mm/15.7 inch. The cable length is 150mm/5.9inch. The extreme expansion length is almost 300 mm/11.8 inch. The way to use – It is easier to use this ball stretcher 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.