Biogel® Surgeons Latex Surgical Glove, Size 5.5, Straw Color, 1 Box of 50 Digit Exercise Products The integral absolute vertical and Style:1 Pair (Left & Right) The integral absolute vertical and horizontal levels are permanently incorporated into the digital goniometer arm * Goniometer reads 0 180 degrees on LCD screen * Has ability to freeze angle measurement * Powered by 1 9V battery * Goniometer exterior is powder coated steel with inch cm marks screened onto arms * Digital angle reached in center * Horizontal and vertical levels to indicate level or plumb starting point * 1½ inch core size Micro roughened surface feel and comfort