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 Working Function: --Elieve chronic back pain --Compact, lightweight and portable --Correct postural imbalances --Prolapsed Intervertebral Disc (PIVD) --Slipped disc / Sciatica --Lower back pain / Lumbago // Cervical Spine --Restore the natural curvature of the back --Improve flexibility in shoulder and back muscle Benefits to you: --Relieve fatigue and pain in shoulder and back --Restore the natural back curvature --Improve flexibility in shouder and back muscle --Correct postural imbalances   Package included: 1 x Back Stretcher（With English manual） Note: Please allow 1-2mm in size measurement chart for variance due to manual measurement.