The 49493491 NBR O-Ring from Freudenberg-NOK features a size of 81.00 mm outer diameter and 1.50 mm cross-section, making it ideal for sealing applications in various environments. Made from high-quality Nitrile Butadiene Rubber (NBR), this O-Ring offers excellent resistance to oils, fuels, and other chemicals. It is designed to withstand temperatures up to 90°C, ensuring reliable performance in demanding conditions. This O-Ring is compliant with industry standards, making it suitable for use in automotive, aerospace, and industrial applications where a secure seal is critical.