• Writing Surface The writing surface is essentially a White Painting 0.2mm thickness metal sheet that is crafted by us specifically for writing with Marker Pen. • Frame All our chalkboard frames are manufactured from extruded Alloy Aluminium 6063-T6, the thickness (1.2mm) frame in the form of a closed section, to offer maximum rigidity, which is anodized in a seamless Matte Silver... https://www.industrywaala.com/product/s-cube-sliding-board-65-inch-all-white