The Freudenberg-NOK Dichtomatik OR 1.987" is a high-quality O-ring made from 90 NBR (Nitrile Butadiene Rubber), designed for durability and resistance to various chemicals. With a cross-section of 0.103", this O-ring is ideal for sealing applications in hydraulic and pneumatic systems. It meets industry standards for performance and reliability, ensuring a secure fit in various assemblies. The N901W model is particularly suited for environments where oil and fuel resistance is critical, making it a versatile choice for automotive and industrial applications.