The Freudenberg-NOK Metric O-Ring features a 3.8 MM inner diameter and a 1.9 MM cross-section, with a hardness rating of 70 durometer. Made from high-quality Neoprene, this O-Ring is designed for excellent resistance to weathering, ozone, and various chemicals, making it suitable for a wide range of applications, including HVAC and automotive systems. Its precise dimensions ensure a secure fit, providing reliable sealing performance in both static and dynamic applications. This O-Ring meets industry standards, ensuring durability and effectiveness in demanding environments.