Noble Men's Engagement RingBreaking through traditional design, it gives people an infinite and vast space imagination with its independent design style. It has a long heritage of craftsmanship. UNA&CO unique technology to make it feel like 100% platinum. The materials used are 30% platinum & 70% silver,which are anti allergic, non tarnishable and antioxidant. Gentleman style men's ring design, wide enough ring band to distinguish from women's rings. The ring surface is smooth