1.Size & Packaging - The length of the spring tube bender is 350mm/13.78'', the inner diameter is 19.2mm/0.76'', and it is suitable for tubes with an outer diameter of 3/4''. The package contains 1 piece of spring tube bender. 2.Material - The spring pipe bender is made of spring steel, which has high elasticity and can withstand repeated arbitrary bending. It can to its original shape after use without deformation. At the same time, it can withstand greater stress without breaking easily and is very durable. 3.Design - The spring tube bender has a flared design at one end, which makes it easier to slide the pipe, making the bending process more labor-saving and reducing physical effort. It can bend thin-walled tubes to precise angles (up to 180 degrees) without crimping or folding the pipe. In addition, the tube bender can be in its original shape after use, and it can be reused for a long time. 4. - Put the spring tube bender on the outside of the pipe, hold both ends and slowly apply force to bend it to the desired angle. For better results, you can use one tube bender above the pipe and another tube bender inside the pipe.