Construction:twin-wall, triple-wall. Max. Width:2100mm, length up to requests Standard thickness:4mm, 4.5mm, 5mm, 6mm, 8mm, 10mm, 12mm for twin-wall pc sheet 8mm, 10mm, 12mm, 16mm, 20mm for triple-wall pc sheet Color: clear, blue, lake-blue, green, brown, grey, opal-white, red , etc. Usage of polycarbonate sheet: 1. Subway exits, parking lots, bus stop, shopping arcades, large stadium and rain tents, etc 2. Green-house, swimming covering 3. Roof light or canopy for office buildings, department stores, hotels , schools, amusement centers , hospital, etc 4. Sound boards for advertisement, housing glasses , side walk, and protection, window of bank, jewelry shop.