3D Adjustable Flag Hinge Material: Body Zinc, SpIndle Milld steel with yellow Zinc plating, cover Nylon 66, Bush Nylon 66, Orientation pin stainless steel 304, adjust screw Mild steel, Assemble screw stainless steel 304. surface condition: plastic powder coat etc. Contact: Mr Adam Zhong Chief Engineer Ningbo fenghua keyuan industry Co.,Ltd Signature hardware departmet E: adamATkeyuanindustriesDOTcom