Durable material: The elastic cords of the tarpaulin are made of nylon, rubber and plastic ball ends, durable and resistant to fraying. They can also provide constant tension and a firm hold. . Size: The total length is about 20 cm, stretches to 40 cm. The diameter of the ball is approximately 2.75 cm. The diameter of the elastic cord is approx. 4 mm. . Application: The durable ball of rope is suitable for tents, tarps, flags, blankets, trampolines, sleeping bags and more, a great addition to an outdoor hiking, camping kit. . Easy to use: The elastic loop is passed through this and around a suitable solid article, then it is returned over the ball. With the strong elasticity, don't worry your item is so big that the elastic rope can't hold. . Scope of delivery: 25 x Bungee Ball Tensioners to meet most needs. The elastic cords are also good for fastening and securing items around the house or outdoors. .