Features： 1、It is ergonomically designed to fit the natural curve of the human body. 2、Traction spine curve design, close to the spine, help you sit upright. 3、This product helps you to easily relieve lumbar spine problems anytime and anywhere while lying down. 4、The environmentally friendly material is more reliable, and the lumbar traction device can bear 100KG without breaking. 5、There are 8 massage points, which can press different parts of the body. 6、It can be adjusted in three levels, suitable for general use by all people. Specification： Condition: Item Type: Back Massage Stretcher Material: ABS Optional Color: Black Blue, Black Green, Black Purple, White Blue, White Green, White Purple GearsFrom the groundSuitable for 1st Gear7cm / 2.8inBeginner 2nd Gear9cm / 3.5inIntermediate people 3rd Gear11cm / 4.3inAdvanced people Package List： 1 x Back Massage Stretcher 1 x Base 1 x Foam Pad