ZINC OXIDE Zinc Oxide (also called Zinc White) is an amorphous white or yellowish powder, insoluble in water and alcohol but so Other Names: Zink oxide Copper colored metal puzzle, new style, EN 71 certified. we call it metal puzzle ''star and ring''. Material: zink alloy For More info / Free quotation Please call : 019-3905915 / 016-2085915 Model Number: Zink ZINC OXIDE Zinc Oxide (also called Zinc White) is an amorphous white or yellowish powder, insoluble in water and alcohol but so Other Names: Zink oxide Copper colored metal puzzle, new style, EN 71 certified. we call it metal puzzle ''the lock and the key''. Material: zink alloy Copper colored metal puzzle, new style, EN 71 certified. we call it metal puzzle ''star and ring''. Material: zink alloy Copper colored metal puzzle, new style, EN 71 certified.We call this puzzle as ''the Bicycle''. Color:ancient effect puzzle. Material: zink alloy silver colored metal puzzle, new style, EN 71 certified. we call it snow shaped metal puzzle. Material: zink alloy