Use:Message Board Magnetic:No Material:Cork Surface:Nature Cork Sheet Middle:Cardboard / Foam Board / LDF board / MDF board / KT board Back:0.18mm zinc sheet /plastic back / Mdf board Frame:Aluminum Corner:plastic ,round Cork Thickness:1mm to 15mm Marker Tray:Half length or full length Hook:Visual or Invisual Function:using for pins, in office ,school, home Size:from 20 cm to 400cm Show More