High elasticity: 55cm to 200cm. The belt tensioner is made of high-quality elastic fiber, a strong chrome-plated metal clip, and a black and white nylon rubber band with good elasticity and a smooth texture. It can be fully adjusted to fit any sheet size. Their robustness guarantees a very reliable clamping force during all phases of elongation. The annoying problem of the tensioner slipping is finally a thing of the past. Particularly durable: sheet metal tensioner, you can count on perfectly crafted seams. To make it as easy to use as possible, our tensioner is equipped with a high-quality metal clip that can be easily and continuously adjusted to the desired size. Strong Resistance: Durable metal clips with a built-in plastic locking system to protect the fabric from damage. Its extremely strong pressure ensures the tensioner stays in place, but it is very gentle on your fabrics. The length of the elastic can be stretched as needed, and the maximum length can be stretched to 200