Antique aegean bronze scallop convex shell wall clock, the manufacturer use strong material called fiber stone to make this larger scale size of scallop-shaped wall clock, this material is a durable stone and fiber composite that is suitable for outdoors and interiors. The antique aegean bronze finish with green accent plus gold-tone hands give this wall clock its traditional beauty. Metal might. Requires one AA battery, which can be bought anywhere and will last approximately one year before needing to be replaced. The gold tone hands made of solid aluminum which will not rust, the hands also gave a special sheet metal versus the usual type that others might typically use. This ensures that Hen-Feathers clocks will last longer and stay more beautiful season after season.