1.Face:Magnetic Steel 2.Frame:Aluminium 3.Middle:Corrutaged cardboard/MDF 4.Back:Zinc 5.Category:white/black/green board Magnetic white board,white board,whiteboard,dry erase board1. Magnetic white board surface, and the white board sheet imported from Japan. Using for marker. We are have porcelain white board steel too.2. Inner of the white board can be 7-layer strongs cardboard, Honeycomb board ...