Tensioner for tarpaulin: tensioner for ball contains 50 pieces the length of the cable is 100 mm. These reliable rubber harnesses provide a secure hold to your tarpaulins and banners. rubber and high quality plastic ball. It is durable and friction resistance. It has a large tension to firmly fix the tarpaulin. Tensioner tarpaulin is suitable for tents, posters, pavilions, trampolines, mesh banners, PVC banners, It has a large tension to firmly fix the tarpaulin. It is easier to use this tensioner for ball 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 too big for the cable to break. Tensioner rubber ball can be attached and removed in a few seconds. Plastic and rubber have high weather resistance.Adjust the length of the rubber by moving the knot.