... 2. cover is blacken finishing,3. machining parts of Microscope Chengdu Khons Trading Co., Ltd.--High Precision ... Machining Materialsaluminum, copper, brass, stainless steel, alloy steel , bronze, or customer specified3. FinishingAnodizing, Electroplating, Polishing, Powder Coating, ... Hardening, Painting, Silk printing and many other treatment of the parts.4.Quality Assurance IPQC inspect each during ...