... 250mm, 1, 270mm, 1, 550mm, 1, 550mm for your choice Length: According to your requests Thickness: 2mm, 3mm, 4mm, 5mm, 6mm Aluminum thickness: ... 0.35mm, 0.40mm, 0.45mm, 0.50mm Standard: According: GB/T 17748-1999, UKAS, ISO9001: 2000, ASTM Features ... UV characteristics, retain color after long exposure; Weatherability; Resistant to blow and breakage; Vibration damping; Sound insulation; Heat insulation ...