The OR 4.859 0.139" 90 FKM V904Z O-Ring by Freudenberg-NOK is designed for optimal sealing performance. This O-Ring features a diameter of 4.859 inches and a cross-section of 0.139 inches, made from 90 durometer FKM material, ensuring excellent resistance to high temperatures and aggressive chemicals. It is suitable for a variety of applications, providing a dependable seal in challenging environments. This O-Ring meets industry standards, making it a reliable choice for professionals seeking quality and durability.