Uses: Shoulders Material: Polyurethane Item Weight: 1120 grams Brand: RAKUNA Features: Portable Product Dimensions: 40 cm length x 27 cm width x 110 cm height Relieves shoulder stiffness by loosening the shoulder blades! Supervised by a shoulder blade specialist chiropractor. Replicates the techniques of a chiropractor, swaying gently to apply pressure to the back and shoulder blades, areas you can't reach yourself. Features 18 protrusions to apply pressure to the shoulder blades and surrounding muscles, and a specially designed curved shape to support the back. Sways from side to side, powerfully loosening even the hard-to-reach shoulder blades※ by applying your body weight. No instruction manual included. There are no scratches, but please refrain from purchasing if you are sensitive to used items due to home storage. Thank you for viewing.