Product Description Material: ABS plastic & sponge : black, pink black green black Product size: 370 * 245mm / 14.57 * 9.65in Product function: spine correction, hump / hip acid improvement Package content: 1* orthosis 1.STURDY MATERIAL - The Spine deck back stretcher uses environmental ABS and NBR material to give you harmless and safe using experience while sturdily stretching your back. Won't easily get out of shape even when folded. 2.EFFECTIVE ACUPRESSURE MASSA - The back massage stretcher arch has 10 magnetic dots and 88 plastic pins that brings a uncture effect by deeply pressing the specific a oints. The back stretcher helps activate the natural healing response and improve the circulation to give you completely relief for back pain, spinal pain, muscle pain,etc. 3.ADJUSTABLE STRETCH LEVEL - The back massage stretcher has 3 slots for height adjustment. The higher the back stretcher lifts the stronger stretch you will get. 4.ERGONOMIC DESIGN - Basing on ergonomics concept, the contour of the lumbar traction device is in standard body curve to provide better spinal alignment and efficient a ressure massage. The foam pad in the center of this lumbar back stretcher gives cushioning to ensure your spinal feel comfortable. 5.MULTI PURPOSE - The lumbar alignment stretcher can be used whenever you are lying or sitting. The back alignment device can be placed on a chair to help correct your sitting posture, or car seat to serve as a lumbar stretcher for car that helps reduce the tiredness especially for long time road drive.