The Aristocrat Deluxe Oak Frame CL Series Chalkboard. The surface is made with a special, two coat baked finish, carborundum slating surface that yields a vivid image for years to come. This board will erase easily during daily use. A durable hardboard back provides added durability. The surface is better than ever. Oak Frames in Sizes up to 3' x 4' have a 1-1/4'' Oak Frame and the 3' x 5' boards have a 2'' Oak Frame. Available in Green or Black. by Aristocrat