... Good air tightness 4. Environmentally-friendly Specification: 1. Material: -Aluminium Alloy - UPVC Materials (Model: 60, 70, 80, Chameber: ... glass, LOW-E glass, Patterned glass, etc. 5. Aluminium Surface Finish: Anodizing, Powder Coating, Grinding, Blasting, PolishingUPVC Surface ... 7. Handle: Handle with Transmission Gear, Lock optional 8. Seal: Rubber sealing strip, black or grey color 9. Screen: ...