Chef-master 90030 – reversible write-on board, black/white,18″ x 24″ sign dimensions – 18″ x 24″ double sided boards 5 rain proof markers included reversible – one side white & one side black heavy duty construction provides durability pre-attached hooks allow for vertical or horizontal hanging durable 5/8″ aluminum frame rust resistant grade 304 stainless steel hardware allows for indoor & outdoor use