Corner brace Material: Iron Finish: Zinc plated Size: R 17x17x35, 20x20x50/67/86, 48x48x40, thickness 1.2mm, 2.5mm. Corner braceMaterial: IronFinish: Zinc platedSize: R 17x17x35mm, 20X20X50mm, 20x20x67mm, 20x20x86mm, 48x48x40mmThickness: 1.5mm, 2.0mm.Size and Thickness also can be customized Corner