The Freudenberg-NOK O-Ring, model S750FM, features a size of 3.850" with a cross-section of 0.210" and is made from high-quality 75 VMQ silicone material. This O-Ring is designed for superior sealing performance in various applications, ensuring durability and resistance to temperature fluctuations. With a hardness rating of 75 Shore A, it provides excellent compression set resistance and longevity. Ideal for use in automotive, industrial, and fluid handling systems, this O-Ring meets industry standards for reliability and safety.