... for 18 years. Good quality Competitive price Long guarantee. 1. Board Size:1500L*1000Hmm2. Surface material painted magnetic steel sheet 3 ... Polystyrene 11mm thickness 4. Back:Zinc Coated Steel Sheet 5. Board Frame:16mm alum,thickness 1.0mm,Plastic Corner of Frame ... ,thickness 1.0mm,Plastic End Cap for Pen Tray 7. Moving Metal Frame:Epoxy Powder coated,antirust,damproof,strong8. Design:As ...