Rubber Material: Unlike many tarp tensioners that use low-quality rubber cords and small, cheap balls that break easily, the cord on this product is made of multifilament rubber. Its highly elastic rubber core ensures it won't break or tear easily, with excellent elasticity and recovery, allowing it to meet various needs. High Elasticity and Safety: Our bungee cord with ball is designed to meet the high demands of users. The tarp tensioner is made of special rubber with good elasticity and recovery, which can stretch up to twice its length, providing constant and secure tension for your items. The bungee cord with ball can be used outdoors and maintains high elasticity and tensile strength. Easy to Install: Easy to install and remove, anytime, anywhere. Simply tie two or more straps together and pass them through grommets, poles, or any other object that needs securing. It won't collapse, strong enough to connect whatever you want—a perfect tool for camping, hiking, and other outdoor activities. No size limit: One pack contains 50 elastic rubber cords with balls, 25 of which are 15 cm and 20 cm long. Thanks to their innovative design, our elastic rubber cords for tarps with balls can be extended as needed. Even if you need a length greater than a single elastic cord, no problem, simply tie several together to achieve the new length. Multiple uses: The 15 cm and 20 cm lengths are sufficient for everyday tying needs and can be reused. Perfect for securing loose household items, widely used for various small items indoors and outdoors. Whether it's a tent, tarp, wall tube, poster, trampoline, screen, net, or other items, these elastic bands will ensure you're prepared and will be a great help in your life.