It is Two Post 19in Relay Rack, 78in High (44RU) (82in including support base and casters). This rack incorporates a self squaring self leveling design to greatly speed installs. Each rack channel is made of 11 gauge steel providing superior stability & strength. About 800 pound weight capacity. Finished in black or gray powder coat & includes 50 rack screws. This rack comes with a floor support base for flush mounted equipment that may shift rack's center of gravity to the rear of the rack; and comes with four medium duty casters (wheels) mounted under the base that make the rack to be portable. Each caster will support 200 lbs (evenly distributed) giving your total caster weight capacity of 800 lbs per rack. Casters add 3.75 inches to the total height of the rack. The rack shelves are sold separately.