New products Latest design windows and doors China supplier Aluminium Sliding Window on China WDMANew products Latest design windows and doors China supplier Aluminium Sliding Window Product Description Company Information Packaging & Shipping Project Case Performance Performance Themal insulation U2. 2 W m2k 4 level Accusic performance 28db ~ 40db 2 ~ 4 level Water tightness 350Pa 4 level Air tightness 5. 5m3 (m2h) 5 level Wind load resistance 4. 0 ~ 5. 0 Kpa 7 ~ 9 level Performance Profile Thickness 1. 4 ~ 2. 0mm Profile Depth Frame 80mm; 120mm;