6:12 Black Powder Coated Steel Panel Gable Plate. 4 mm Thickness Panel, Secure Support and Match Decor. Our VEVOR outdoor gable plate comprises 4 mm/0.16 in. thick steel panel with black powder coating, adding decorative charm and strength to any outdoor living space. You can easily install the gable bracket with the help of screws to reinforce the wooden beam’s connection to the 3 inclined wooden shelves. While strengthening your house structure, it also increases the value of your house. It is very suitable for outdoor projects such as pergola and timber framing cover.