... the RAL chart.3) Glass: Different glass options are available , such as frosted glass, tempered glass, laminated glass , tinted glass, coated glass and low-e glass, 5, 5+6 ... etc…..4). Hardware: KINLONG, Roto, Siegenia and ect. (Europe standard channel)5). Excellent watertight, airtight, sound insulation, heat insulation6). Outward or ...