Blue Mounted Background. This versatile background can be used as a colorful backdrop for several of our educational stories and rhymes! Our mounted flannelboards are handcrafted onto lightweight, reinforced cardboard backing and forms the environments for many of our educational products. 26"x36" mounted (cardboard-backed) background.Special Shipping Information: This item ships separately from other items in your order. This item cannot ship to a P.O. Box. This item may be subject to additional processing days.