chalk board product is characterized with high quality, durable,economical,practical and elaborate chalk boardFrame: silver grey aluminum frame, 19(wide) ×19(deep) ×0.8(material thick)mmSurface: metal baking finishing, 0.25mm thick. Interlayer: double A corrugated cardboard/high density EPS, 12mm thk.Backboard: Galvanized board, 0.25mm thk; Accessories: stainless steel hooks, marker pen tray.