This double sized Message Board is used in conjunction with two GeoCube recycling units or the dual stream Double Down reycling units. The board comes with a pack of 5 magnets so you can choose to recycle cans, bottles, trash, paper etc. The message of your choice. Just slide the Message Board in the sides and back of the GeoCube and it is ready to go. Perfect for restaurants, hotels, universities, cafeterias, anywhere recycling is a must.