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- Zinc Industrias Nacionales S.A. - Zinsa , is a non-ferrous metal manufacturer. Our products, Zinc Oxide, Zinc Alloys for die casting (Zamac), Zinc Alloys for galvanizing, Antimonial Lead, Copper Alloys, and Lead Calcium Alloys for Batteries are distributed in more than 32 countries worldwide to end users, traders and to other agents which distribute our products. List of Products Zamac Zinc ...www.zinsa.com