Tarpaulin tensioner: tensioner for ball contains 30 pieces the length of the rope is 200 mm / 7.9 inch. The extreme expansion length is nearly 400 mm/15.7 inch. Easy to use black bungee cord: It is easier to use this bungee cord than others, just pull the rubber cord 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 will break. High Quality Ball Bungee: These reliable rubber harnesses provide a secure hold for 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. Its use life is more than 2 years. Wide range of applicationsTarp stretcher is suitable for tents, tarps, posters, stretchers, expansion rings, tarpaulin supports, rubber tarps , rubber tensioners, tents, rubber, curtains, etc. It is a good equipment for camping or storage.