1,can be used in exterior or interior 2,no noise when rolling door working 3,be security for use 4,colors for available To athens white mainstream ,to make his body stainless steel fresh, the results are perviousto wind is light. NamesTides Colored Plate DoorCode318 MaterialsColor Stainless SteelStandard ColorWhite,Blue,Yellowish Single-Plate Height82mmThickness0.4mm or 1.0mm Max Height6000mmMax ...