McKesson Single Layer Sterilization Wrap, 30 x 30 Inch, 1 Box Diagnostic Recording Paper and Film Rocker Board * The new Wrist and Hand 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 * * Simple to use on off controls * Two year manufacturers warranty * Single layer wraps made of soft Natural cellulose material provides strength