The Freudenberg-NOK 0.103" 70 VMQ O-Ring SI70A4 is designed for optimal sealing performance, featuring a diameter of 4.987 inches. Constructed from high-quality VMQ (silicone rubber), it provides excellent resistance to extreme temperatures and a variety of chemicals. With a hardness rating of 70 Shore A, this O-ring ensures a secure seal in demanding environments. It meets industry standards, making it suitable for automotive, aerospace, and industrial applications. Its precise sizing and durable material make it an effective solution for preventing leaks in critical systems.