... fire-resistance, noise-absorbing 2.Fire resistance rating: ARock Wool sandwich panel:Specification: 1. External / Internal steel panel: Thickness: ... stainless steel coil. Finish: Galvanized, colour-coated with PE or PVDF, stainless steel with brushed, mirrored, PVC film 2. Core material ... 0.4mm-1.0mm galvanized plate 6. Panel shape: plug-in wall panel, Mutual-insert sandwich board (S-type), Four-peak ...