... hardware for the stereo set 1) material: can be steel, brass, stainless steel, plastic, Aluminium…2) surface treatment:kinds of plating (Zinc ... , Chrome, Tin, Ag); Painting, Powder, Anodizing, E-coating, Silkscreen, Heat treatment, Black oxid; 3) producing scope: stamping, turning, welding,die-casting ... workshop Assembly workshop The Company Travel hardware for the stereo set