The RW30-2C 30-Comparment OptiClean™ NeWave™ Glass Rack with Three Extenders is the ideal glass rack for any establishment that wants to color-coordinate dish washing operations and has a number of glasses that are 2 7/8" in diameter and 7 15/16" tall. The extenders on this rack are black, while the base is blue, so establishments that have several sizes of glasses and need separate racks can pair this rack with those of other colors and easily train employees on which glass goes into what color rack.