Made of high quality extra hard dense eva foam with unique drop shape proven design.,reused and very sturdy . it can effectively and seamlessly fit the lumbar and back .Use it for firmer pressure. laying down on our back massage,Open arms, spread to the lungs and make breathing deepened, creates cervical traction by stretching the back backwards,while providing a deep trigger point massage.The massage points will use direct pressure on cervical spine points to release the tension and relieve painm also increases blood flow and oxygen to the muscles.Size is 10"(26.5cm) in length, 8.6"(22 cm) in width and 8.5cm(3.3") in height,fits for adults, with smooth surface, it is very comfortable to use, smooth and durable.Also can be used when you are sitting in a chair, standing against a wall. If youre dealing with lumbar and neck pain, consider giving massage therapy a try.Size 26.5* 22 *8.5 cmMade of high quality extra hard dense eva foam Package included:1 X Trigger Point Massager ToolNOTES:Due to the different monitors and light effects, the actual color of the item might be slightly different from the color showed on the pictures. THANKS!Please allow 1-2cm measuring deviation due to manual measurement.