Applications: For quickly and easily stretching tarps, posters, pavilions, trampolines, mesh banners, PVC banners, sails and films. Universal! SR: Thanks to their high quality, you can use your tarp stretchers for a long time without worrying about how to restore them. Reusable: Elastic cord with rubber ball can be installed and removed in seconds. Plastic and rubber have good weather resistance. Flexible Length: You can adjust the rubber length by moving the knot. A tarp that is too loose will stretch quickly. Tarpaulin Tensioners: Ball Tensioners contains 30 pieces, cable length is 90mm. Highlights - Stable: Elastic safety straps securely hold tarps and banners in place. - Durable: Made of strong material. - Practical: Simple and fast application. - Flexible: The professional quality ball tensioner is ideal for professional and private use. Size: 20 rubber tensioners of 20 cm White