Tarp Tensioners: Ball tensioners include 30 pieces. The cord length is 200mm/7.9 inches. The extreme expansion length is almost 400mm/15.7 inches. The cord length is 150mm/5.9 inches. The extreme expansion length is almost 300mm/11.8 inches. Easy-to-use black elastic tensioner: This ball tensioner is easier to use than others. Just pull the bungee cord through the hole and place it on the ball. This cord has the best strong elasticity. Don't worry that your item is too big for the cord to break. High-quality ball tensioner: These reliable rubber harnesses provide a secure grip for your tarps and banners. High-quality rubber and plastic ball. It is durable and friction-resistant. It has great tension to fix the tarp securely. Its lifespan is more than 2 years. Wide range of uses: Tarp tensioners are suitable for tents, tarps, posters, tensioners, expansion rings, tarp fasteners, rubber tarps, rubber tensioners, tents, rubber, curtains, etc. It is good equipment for camping or storage. Whether you are a professional worker ★『100% After-Sales Guarantee』: You don't have to worry after purchasing the product. If you are not satisfied with our products or have any questions, please feel free to contact us. We will certainly give you a satisfactory answer.