The 75031840 O-Ring is a high-quality NBR (Nitrile Butadiene Rubber) seal measuring 0.671 inches in outer diameter and 0.139 inches in cross-section. This O-Ring is designed for effective sealing in various applications, providing excellent resistance to oils and fuels. The 70 durometer rating ensures durability and reliability under pressure. Ideal for use in hydraulic and pneumatic systems, this O-Ring meets industry standards for performance and longevity, making it a trusted choice for engineers and technicians.