Feature:- 1. A convenient at-home back pain treatment and preventative care product for people of all ages 2. Tough and thick hi-tech ABS plastic for long durability 3. Unique design according to the human body's physiological curve of the spine, better eliminate the source of back pain 4. Multi-level adjustments: 3 different height level stretching arch, choose the suitable level for your body, and exercise your back in a healthy way 5. Greatly help to relieve chronic back pain and correct postural imbalance, restore the natural curvature and improve flexibility in shoulder and back muscles 6. Use as daily traction therapy: thumb tip nodes on product surface like massage, stimulate the back points and promote blood circulation 7. Simple and easy to install and use, lightweight and portable to use in travel, at home or office Direction: Comes in separate parts. Assembly required Please start stretching slowly to prevent muscles excessive pain Please stop if you feel uncomfortable and consult your doctor