Stretch Step-TubeStretch Step Tube The center strap of this stretch tube reduces wear and tear on the tube and adds a new dimension to your tubing. It also can be used with an exercise step for an impact accelerated workout. Exercise Tubing with Handles enable toning and strength training of most muscle groups through provision of a resistance. Nylon strap prevents wear and tear directly on the tube. The Stretch Step Tubes come in different resistance levels to cater