Rocker Board 13 1 8 x 14 Personal Protection Products Supports the AMA Guides Measures Select Ear:Left Ear Supports the AMA Guides Measures Joint Range of Motion Spinal subluxation and Cervical Flexion and Extension Multiple Data Storage and Viewing The Acumar Digital Inclinometer Suite provides accuracy repeatability and objective documentation of range of motion measurements * Hook and loop fastener secures extension to mattress to reduce shifting Rocker Board * The new Thera Band© Rocker and Wobble Boards combine an aggressive anti slip base design with a sensory stimulation surface to offer a new performance level to balance training * The Rocker Board moves forward and backward while the Wobble Board has a rounded bottom that moves in all directions * Both are made from lightweight molded plastic * Rocker Board: 13 1 8 x 14 *