... Waterproof and heat insulation 4. Fast and convenient in Paper Honeycomb Sandwich PanelsSpecification:1. External steel panelThickness: 0.4mm ~ 1 ... PUDF, Stainless steel with brushed/mirrored. 2. Insulation materialType: Paper honeycomb, Aperture: 20-35mm 3. PanelWidth (mm): 980, 1180( ... usually use EPS, XPS, PU, Rock wool, Paper honeycomb, Aluminum honeycomb etc.They are widely used in clean room as ...