50 pieces tarpaulin tensioner set: you will receive 50 pieces elastic straps with ball in the pack. The length of the rubber loop is approx. 6.1", Rope Diameter:4mm, Ball Diameter:27mm Elastic tent rubbers: Our rubber tensioner is made of high-quality elastic rope and a plastic ball, which has good elasticity and is not easy to break. The extendable size can reach 30 cm (11.8 inches). Ideal for indoor or outdoor use. Multifunctional use: the elastic straps are a practical helper for daily binding needs, which can be used to secure household items, trampoline attachment, canopies, tarpaulins, net banners, gazebos, tents, sleeping bags, etc. Easy to use: the elastic tent rubber is easy to use. Pull the rubber rope through the eyelet and then pull the loop onto the plastic ball. You can easily adjust the rope to ensure you have the right length and tension. Reusable: The elastic rubber tensioner provides good resilience, smooth operation, is durable and wear-resistant and can be reused several times.