"Open/Closed" message sign features a message area on both the front and the back of sign. Communicate with customers as they enter and exit your business. Ultra-thin, lightweight sign installs in minutes using the supplied, tool-free suction cups. The open and closed part of the sign flips and reverses easily so you don't have to reapply the sign every day. Load open and closed signage from the top. Letterboard includes a full set of 258 assorted 3/4" letters, numbers and symbols.