... glass(5-10mm) Interior Pvc Window,Pvc Window,Pvc Sliding Window 4.Thickness of material profile:1).Aluminum Alloy:1 ... UPVC windows1)waterproof,fireproof,sound insulation,corrosion resistant2) Environmentally friendly, Energy Efficiency,Thermal insulation3) UV protection - will not fade or discolor4 ... maintain13.All the designs: Interior Pvc Window,Pvc Window,Pvc Sliding Window with white colors