Tondo is a semicircle and bar geometric brass ring — a smooth semicircle element meets a clean bar on an open adjustable band, the contrast between curved and straight giving it a deliberate architectural quality. Also described as a bar and arc ring. Molten brass poured into a hand-pressed sand mold — the casting process that's shaped metalwork across cultures for thousands of years, and still leaves every piece unique.A nano ceramic e-coat over solid recycled brass delivers superior durability and resistance to water, sweat, and tarnishing. The shield is invisible. The durability isn't.Product Details Material: Solid recycled brass with nano ceramic e-coat Tarnish resistant, water resistant, hypoallergenic, nickel free Ethically handcrafted by Fair Trade artisans Tondo is one of the oldest continuously inhabited settlements in Asia — a place of ancient trade, always at the crossroads. SKU: JR113A