The Freudenberg-NOK 0.644" O-Ring, made from 70 durometer CR (Chloroprene Rubber), is engineered for reliable sealing in various applications. With a cross-section of 0.087", this O-Ring offers excellent resistance to aging, ozone, and weathering, making it suitable for outdoor and industrial environments. It meets industry standards for quality and performance, ensuring compatibility with a wide range of systems. Ideal for hydraulic and pneumatic applications, this O-Ring provides a dependable seal that enhances the longevity and efficiency of your equipment.