Keep clinic procedures moving smoothly by indicating the status of an exam room with these color-coded signal flags. Set up your own color-coded signals for doctors and staff. Different-colored flags can indicate Doctor in exam room Nurse and patient preparing for doctor or X-rays being taken. Four-flag set comes in the primary colors: red green yellow and blue. Signal flags are made of high-quality scratch-resistant plastic and plexiglas and include mounting hardware. Signal flags are held firmly in place with tensioning springs and snap to five positions.