Metatial: Aluminum Die Casting, Zinc Die Casting, and Alloy Die Casting etc. Surface treatment:shot blast,sandblasting,spray painting as you requirement. BoLang Factory mainly deals with aluminuim castings of the following products, covering: metal parts processing, automobile spare parts aluminium castings, aluminium metal mining machinery, , electrical products ,instrumentation aluminium castings, electrical tools, pneumatic tools , and other agricultural machinery.