The Freudenberg-NOK O-Ring is a reliable sealing solution made from NBR (Nitrile Butadiene Rubber) with a 70 durometer hardness. It features a 0.139" cross-section and a 3.609" inner diameter, making it suitable for a variety of applications. This O-Ring offers excellent resistance to oils and fuels, ensuring durability and performance. It complies with industry standards, making it compatible with numerous systems. Ideal for hydraulic and pneumatic applications, this O-Ring provides effective sealing under pressure, enhancing the longevity of your equipment.