Rothco Thin Blue Line Silicone Ring 14. The ring is made of a medical grade silicone that is non-conductive which provides a safe durable alternative to the traditional metal wedding ring. With a tensile strength of 80kgf this silicone ring is meant to stand up to extreme pressure when put to the test. The Thin Blue Line center showsrespect and support for Police and Law Enforcement Officials.' Specifications for Rothco Thin Blue Line Silicone Ring: Manufacturer: Rothco Color: Black/Blue Fabric/Material: Silicone Features of Rothco Thin Blue Line Silicone Ring Material: Silicone Material Specs: 100percent Silicone Package Contents: Rothco Thin Blue Line Silicone Ring The Rothco Thin Blue Line Silicone Ring is a quality addition to the Rothco lineup. For more great deals on Men's Apparel & Clothing by Rothco please browse our Rothco Men's page.