Sandwich Panel is a new green technology building material.It is made of double skin color steel plate and core insulation material. They are compressed together tightly by automatic machine. Core Thickness:50mm, 75mm ,100mm, 150mm Thickness of Color steel plate:0.3-0.8mm Core insulation: EPS, Glass wool, Rock wool, PU Width:950mm/1150mm for wall, 960mm for roof Length: