... Sandwich Panel production process adopts the colored steel plate as surface board , and the core material is the self-extinguishing closed cell polystyrene foam ... ,75,100, 120, 200(mm)Wall Panel Thickness: 50, 75,100,120,150,200(mm)Steel Thickness: 0.196mm~1.2mmColor: Red ... , grey white, blue, green etc Composite Board EPS Sandwich Panel