... 4)good workmanship Black oxidize metal hanger Material: Aluminum,Brass,Copper,Bronze,Steel,Stainless steelProcess: Sand casting, Gravity casting ... , milling, drilling, grinding, cutting, reaming and threadingFinished: Polishing, sand blasting, heat treatment, painting, powder coating, anodizing, electroplating, Chrome ... and Environment Protection OEM & ODM are welcome ! Black oxidize metal hanger