... 4. strong aluminum frame with gutter system.5. 4mm sunshine board by twin wall is light, strong, safe, and virtually unbreakable ... . Strong aluminum frame with gutter system, 2. UV protected twin wall polycarbonate sheet is light, strong, safe, and virtually unbreakable and easy ... or customized size is also availableTube sizeØ16*0.4mm or Ø18*0.4mmNW/GW5.1/5.8KGS40HQ2331pcsUsageplantspackageWhite bag ...