KC8169 frame is injection molding, spleen is nickel alloy, color is: black, transparent wine red, transparent purple tricolor, white transparent gold's separate nose bracket shows fashion avant-garde, gorgeous mirror leg and frame combine, let it become distinct.Metal frame and plastic part are perfectly connected by exquisite rivets. Streamlined design frame with smooth legs more fit the shape of the head. The details of the refinement and the great comfort show the extraordinary process.