This is the Draper 3-Piece Pipe and Drain Runoff Upright. It is used to wall off a room and prevent light from spilling in. Hang fabric from it and create more of a closed environment. Made from aluminum, this system can come in handy when there is too much light in your room either from a window, hallway or other source.
223019 3-Piece Pipe and Drain Runoff Upright