Dear old & new customer, our zehan established a new aluminum anodizing factory last year. so that cooperate our machined products while meet our customers' requirements for surface treatment of aluminum products. we can provide the all kinds of color anodizing, hard anodizing, sandblast etc surface treatment for the 6 and 7 series aluminum products. Also can provide the surface pickling service for the brass, stainless steel and steel. if you have any inquiry, please contact us immediately. Zehan Sincerely at your service.