... ) Simple structure, easy to install 2) Smooth sliding 3) Soundproof, heat insulation aluminum sliding window LOCKS ,ESAY TO WORK MORE COLORS YOU ... seal rubber(EPDM)Surface treatment Powder coating, anodizing, electrophoresis etcHardware Top brand ,like ROTO brand ETCPacking Foam Paper with wooden crateThickness ... ,looks generous7. Available in any size and color you need SLIDING WINDOW