Tarpaulin stretcher: ball stretcher contains 75 pieces the cable length is 150mm/5.9inch. The extreme expansion length is almost 300 mm/11.8 inch. These reliable rubber harnesses provide a secure hold compatible your tarps and banners. rubber and the high quality plastic ball. It is durable and friction resistance. It has great tension to firmly fix the tarpaulin. Tarp tensioner is suitable compatible tents, posters, pavilions, trampolines, mesh banners, PVC banners, It has great tension to fix the tarpaulin tightly. It is easier to use this ball tensioner than others, just pull the rubber cable through the hole and place it over the ball. This cable has the best strong elasticity. Don't worry about your thing being so big that the cable breaks. Rubber ball tensioner can be attached and removed within seconds. Plastic and rubber have high weather resistance. Adjust the length of the rubber by moving the knot.