... 2.Zinc,Nickel or Chromate plating,Anodise Channel to timber connector/ceiling connectorWe provide the product by our customer's design ... anodization, galvanizing, satin, etc File formats:Pro/Engineer, SolidWorks, Unigraphics, Auto CAD(IGS,STP,STL and X-T) Certificate:ISO 9001 ... cooperation with you by our most sincerity!/// Channel to timber connector