High quality: The ball tensioner is made of high-quality nylon, rubber and plastic ball. It is durable and friction-resistant. It has good tension to properly secure the tarpaulin. The tarpaulin tensioner is suitable for tents, posters, pavilions, trampolines, nets, PVC banners, it has good tension to properly secure the tarpaulin. Reusable: 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. 30 pieces Cable length is 150 mm/5.9 inches. The extreme expansion length is almost 300 mm/11.8 inches. How to use - It is easier to use this ball stretcher than others. Just thread the rubber cable through the hole and place it on the ball. This cable has the best strong elasticity. Don't worry that your item is so big that the cable breaks. Product description Elastic tensioner for banner, tarpaulin, pavilion, tent, curtain extension harness, tarpaulin support, durability and friction resistance. It has good tension to properly secure the tarpaulin. Useful for several daily uses, very easy to use tensioner. The attached tent ropes can be attached and removed in seconds without additional tools. No unnecessary cutting of already mounted cable ties, the clips can be reused at any time. Specification: 30 pieces Set Length: 30 pieces 150 mm rubber clips Material: The ball stretcher is made of white nylon, rubber and high-quality plastic ball.