Center Uprights are vertical channels that attach to the frame (top and bottom). Can be used in 800-, 1000-, 1200- and 1600-mm wide frames to facilitate the installation of accessories for 600-mm wide frames and 19-in. rack accessories in wider frames. The vertical hole pattern matches the vertical hole pattern in the frame. Center uprights are made of 12 gauge steel and finished with RAL 7035 textured light-gray polyester powder paint. Center uprights are furnished in pairs and include mounting har dware.