The New Holland 83958129 is a genuine OEM oil seal, also known as a lip seal or 'joint spi', designed for critical sealing applications in a wide range of New Holland agricultural and construction equipment. This high-quality seal features an inner diameter of 40 mm, an outer diameter of 55 mm, and a thickness of 8 mm, ensuring a precise fit and reliable performance. It is compatible with numerous New Holland tractors, combine harvesters, loaders, balers, and other machinery models, providing essential protection against leaks and contaminants.