The New Holland 51556780 is a genuine OEM copper sealing ring, designed for critical sealing applications in New Holland agricultural and construction machinery. This high-quality copper washer features an inner diameter of 12mm, an outer diameter of 17mm, and a thickness of 5.1mm, ensuring a precise and reliable seal. It is a vital component for maintaining system integrity and preventing leaks in various New Holland models, including tractors like the T7.270, T7.260, T7.250, and T7.235, as well as combines and other equipment. Trust in genuine New Holland parts for optimal performance and durability.