Omnimed room Flag systems are made of durable powder coated aluminum and one 4″ flags per unit. Our Flag systems promote efficient operations by providing a clear visual signal for staff. The position and color of the signal flags can be used to designate which doctor is inside or status of each room (occupied, ready for clean-up, patient ready for lab or X-rays, etc. ). . . Simply flick the appropriate flag as you enter or leave a room and the entire staff knows its status.