The Freudenberg-NOK 0.139" 70 VMQ O-Ring SI70A4 is a high-quality sealing solution with a diameter of 4.734 inches. Made from VMQ silicone, it offers excellent thermal stability and chemical resistance, making it ideal for various applications. With a hardness of 70 Shore A, this O-ring provides a reliable seal in both static and dynamic environments. It complies with industry standards, ensuring compatibility with a wide range of systems. Its durable construction and precise sizing make it a dependable choice for sealing needs.