1000 Jewels Marines: Mens 5.0ct Simulated Ruby USA Marines Military Signet Ring 316 Steel, 3062 Rugged, handsome and durable Mens USA - US Marines 316L Stainless Steel Ring Features a 5.0 carat Simulated Ruby bezel set solitaire. Made with solid Stainless Steel 316L. Made with solid 316L Surgical Stainless Steel so you know that it's made to last!