These Best-Rite Combination Boards are a must-have for any classroom. The practical design brings together two types of surfaces, to offer more functionality in one product. You can select from tackboard with porcelain whiteboard or tackboard with porcelain chalkboard, and from various combinations, to suit your requirements. Sizes range from 4' x 4' to 5' x 16', all with a full-length map rail along the top edge of the board. For your peace of mind, the porcelain surfaces come with an incredible 50 year warranty, while the tackboard material is made to last for at least ten years, providing excellent value for money.