1,Natural Physiological Curve: Deeply relax the cervical spine for 15 minutes every day. The natural curve closely fits the human cervical spine, and the physiological curve can effectively reduce neck pressure and relieve neck pain. 2,Compact and Convenient: Compact and convenient, release fatigue at any time, no matter work or life can release lumbar spine anytime and anywhere. 3,Arc Stretching Design: Arc stretching design, fit the extension curve of human cervical spine, suitable for long time sitting and other reasons caused by cervical spine discomfort. 4,Three Gears Selection: Three gears selection, rotation adjustment radian, easy labor saving, can be adjusted according to own needs radian. 5,Manufacturing Material: Made of high quality PP material, strong and durable, which undoubtedly extends its service life. Item Type: Back Stretching Device Weight: Approx.710g / 25.0oz Material: PP 1 x Base 1 x Panel 1 x Manual 1 x Sponge Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Sold by-Minnanxin