The Freudenberg-NOK N901W O-Ring, made from high-quality NBR (Nitrile Butadiene Rubber), is engineered for optimal sealing performance. Measuring 4.350 inches in diameter and 0.275 inches in thickness, this O-Ring is designed to withstand exposure to oils and fuels, making it suitable for various industrial and automotive applications. With a hardness of 90 Shore A, it provides excellent resilience and durability. This O-Ring meets industry standards, ensuring compatibility with numerous systems and applications, making it a reliable choice for effective sealing.