School Smart Railroad Board, 6-Ply, 22 x 28 Inches, Assorted Colors, 25 Boards The School Smart Railroad Board, in assorted colors, is the ideal choice for any creative project. Colors on both the sides is perfect for construction, art projects, mats, mounting, block printing, painting, markers, stenciling and posters. Created with a smooth uniform finish. Made with 6-ply thickness. Display boards with a smooth, uniform finish and vivid color on both sides Create bold signs and posters that stand out Great for stenciling and block printing Sturdy construction yet easy to cut and trace