YAJU Material The tarpaulin clips are made of rubber and plastic with excellent elasticity and resilience, high ductility and wear-resistant. Usage For easy and quick tensioning of tarpaulins, posters, pavilions, trampolines, mesh banners, PVC banners, awnings and foils, household goods as well. Ductility 12cm length in natural state, can be easily stretched to 20cm. Not prone to breakage or pop. The ball 2.5cm. and you can vary the length of the elastic by moving the knot. Can be used in stacks Easy to use Pull the rubber tensioner through the eyelet and then throw it back over the ball and the tarpaulin is tensioned. Quick and easy without additional tools. Specification: Material: rubber, plastic Color: black and white grid Number: 50 pieces Length: 120mm Diameter of rubber rope: 4 mm Diameter of sphere: 25 mm Delivery: 50 x expander loop with ball