NEW Pso-Spine Back Relief and Massage Tool Night Black MSRP $80 11.5" x 4.88" x 2.5" Peak to Peak: 3" The PSO-SPINE is a self-massage tool that can help keep your spinal muscles healthy and your nerves functioning properly to prevent some of the problems that occur from aging, injury, and everyday movement. The 5 peak design of the PSO-SPINE gives you different options to apply pressure on your spinal muscles. The stable structure gives you the freedom to massage any part of your spine that has muscle tension, soreness, and pain. Use at home, at the gym, at the office, or at the airport during a long day, a long trip, or any time you feel back discomfort. The smooth, rounded edges design allows you to use the PSO-SPINE on all chairs. CONSULT WITH YOUR DOCTOR BEFORE USING THIS PRODUCT.