The OR 3.975 0.210" O-Ring is made from 70 NBR (Nitrile Butadiene Rubber), offering excellent resistance to oils and fuels. This O-Ring is designed for a variety of sealing applications, ensuring a reliable seal in both static and dynamic conditions. With precise dimensions, it fits seamlessly into standard grooves, providing optimal sealing performance. The N702V designation indicates its specific formulation, enhancing its durability and longevity in demanding environments. Ideal for automotive and industrial applications, this O-Ring is a must-have for any maintenance toolkit.