... and double glazing; thickness of glass: 4mm, 5mm, 6mm; 5mm+6A+5mm, 5mm+9A+5mm, 5mm+12A+5mm; 5mm+16A+5mm. clear glass, tempered glass, floated glass, ... or without, etc.Reinforcement steelThickness: 1.2mm, 1.5mm, 2.0mm, 2.5mm; U form galvanized steel SealEPDM, rubber sealing strip ... Good waterproof8> Easy to clean9> Corrosion resistance10> Scientific desig white color PVC sliding window with fly mesh