... are zinc-plated steel sheets , color-coated steel sheets with specific core material. the thickness of steel sheet is 0.26mm- ... 1.0mm. Width:950mm,980mm ,1000mm ,1200mm;2)Core Materials Options: Polystyrene(EPS), Polyurethane(PU), and Rockwool Thickness: ... Sandwich panel *Rockwool is featured with the best fire-resistance among three types of core materials, and with more heat & sound insulation ...