- // Features
* High elastic and durable material.
* 2 shapes for different training program.
* Softer and easier to use than traditional spring expander.
- // Specification
* Size: 2 Shapes / 1 SET
O Shape: 11mm x 2mm x 65CM
8 Shape: 12mm x 2mm x 100CM
* Color: Yellow, Grey, Black or Customized.