... Noise-absorbing,heat insulation,easy to install Stainless Steel sandwich panelSandwich is 1 × 304/2b stainless steel plate as surface material, self-extinguishing ... so on. [Materials] applicable1. Up / down stainless steel plate thickness: 0.3 ~ 0.5mm stainless steel2. Core material: polystyrene, rock wool, etc ... and other wet areas of ceiling and partition clean. stainless steel sandwich panel