There's nothing like them on the market.
The chalkboard surface is the highest quality porcelain on steel. The panel construction is composed entirely of non-porous materials to give the board extended outdoor life - free from excessive warping and moisture absorption that you would experience when exposing a standard chalkboard to the elements.
The frame is a beast! Made from dense, heavy hardwood to maintain firm structure, then coated with exterior latex paint or clear sealed for wood finishes.
Use with a regular chalk or markers sold by billyBoards