The gold standard by which the professionals measure quality. USI's ProMount™ Ultra is simply the best - bar none. Individually hand crafted, each board is thoroughly inspected and signed by our skilled craftsmen to guarantee you are getting the ultimate in quality heat-activated mounting board. ProMount™ Ultra's 1/4" thick ultra-rigid foam board is made of high-density expanded polystyrene and double-thick clay-coated paper that is water resistant. Does not warp or bow when working with prints and wide-format graphics. Black. Additional sizes and colors also available.Contains Box of 10 Boards