The OR 390,00 4,00 70 NBR NB7018 is a high-quality O-ring made from 70 durometer Nitrile Butadiene Rubber (NBR), designed for optimal sealing performance. With a cross-section of 4.00 mm and an inner diameter of 390.00 mm, this O-ring is engineered to withstand a variety of industrial applications, including oil and gas, automotive, and manufacturing. The NBR material provides excellent resistance to oils, fuels, and other chemicals, ensuring longevity and reliability. This O-ring meets industry standards for quality and performance, making it a dependable choice for sealing solutions.