The John Deere R30903 O-Ring is a genuine OEM sealing component designed for a wide range of John Deere agricultural and construction equipment. This high-quality O-ring provides a secure and leak-free seal, critical for maintaining system integrity and preventing fluid loss. With an inner diameter of 26.82 mm, an outer diameter of 32.92 mm, and a thickness of 3.05 mm, it meets precise specifications for optimal performance in demanding environments. It is commonly used in hydraulic systems, engine components, and other critical areas across numerous John Deere tractor models, ensuring proper function and longevity of your machinery.