The privacy sign is made of acrylic and it has 2 options:<br> DO NOT DISTURB: when you are at the office and you don't want to be disturbed by anyone<br>PLEASE KNOCK: when you are at the office and you don't mind being interrupted<br><br><b>Features:</b><br>Easy to switch between the 2 options<br>Printed with big bold letters in red or green background<br>Eye catching, easily visible from a distance<br>Double sided adhesive included<br>Easy to install<br><br><b>Package Includes: </b><br>Privacy sign x1<br>Double sided adhesive pad x2<br>