We stock these sandwich sign holders, and print 24×36″ coroplast signs that go into them. This one is for the Shackett’s Micro Brewery in Bristol, NH, which makes some really good beer in my experience!
They have a lower level location that isn’t easily seen from street lever, so a sandwich sign like this helps to bring customers in the door.
The sandwich sign holders are made of blow molded plastic, and when you use a coroplast insert, are completely waterproof