Tarp tensioner: This ball tensioner contains 50 pieces. The cable length is 150 mm/5.9 inches. The maximum extended length is almost 300 mm/11.8 inches. These reliable rubber harnesses provide secure support for your tarpaulins and banners. Made of high-quality rubber and plastic balls, they are durable and abrasion-resistant. They offer high tension to firmly secure the tarpaulin. This tarpaulin tensioner is suitable for tents, posters, pavilions, trampolines, mesh banners, and PVC banners. It provides high tension to firmly secure the tarpaulin. This ball tensioner is easier to use than others. Simply pull the rubber cable through the hole and place it over the ball. This cable has excellent elasticity. Don't worry if your item is too large for the cable to break. The rubber ball tensioners can be attached and removed in seconds. Plastic and rubber offer high weather resistance. Adjust the length of the rubber by moving the knot.