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This is a stud intended for use as the copper-colored button on Obi-Wan's lightsaber in Revenge of the Sith. For myself, I printed this in Stainless Steel, then sanded and polished the curved surface, and plated it with copper using a simple home electroplating kit. You could also powder coat it, or simply paint it. Please note that a good deal of sanding and polishing is needed to make this button look nice when printing in Stainless Steel.