"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/closed signage from the top. Letterboard includes a full set of 258 assorted 3/4" letters, numbers and symbols.