High quality ball tensioner rubber and high quality plastic ball. It is durable and friction resistance. It has great tension to firmly fix the tarpaulin. Tarp stretcher is suitable for tents, tarps, posters, stretchers, expansion rings, tarpaulin supports, rubber tarps, rubber stretchers, tents, rubber, curtains, etc. It is a good equipment for camping or storage. The way to use - It is easier to use this ball tensioner than others, just pull the rubber cable through the hole and place it on the ball. This cable has the best strong elasticity. Don't worry that your thing is so big that the cable breaks. Ball Tensioner - Ball Tensioner contains 30 pieces. The cable length is 150 mm/5.9 inch. The extreme expansion length is almost 300 mm/11.8 inch. Whether you are a professional tradesman or a do-it-yourselfer, bungee cord takes care of your safety and your equipment so that you can fully concentrate on your projects. Elastic Tensioner for Pavilion, Tarp, Camping, Tent, Curtains Extension Harness. HIGHLIGHTS: - Stable: the elastic harnesses securely hold tarpaulins and banners. - Durable: thanks to robust materials. - Practical: quick and easy application. -Flexible: professional quality ball tensioners ideal for professional and private use. Miscellaneous jobs: -30 Pieces 150mm Rubber Tensioner Bungee Ties ideal for attaching or securing a tarp, tent, etc. - Useful for multiple daily use - Very easy to use tensioner