The John Deere ER261421 O-Ring is a genuine OEM sealing component designed for critical applications in John Deere agricultural and utility equipment. With an inner diameter of 20.62 mm, an outer diameter of 23.83 mm, and a thickness of 1.6 mm, this O-ring provides a reliable and leak-proof seal for hydraulic, fuel, and other fluid systems. It is engineered to meet John Deere's rigorous quality standards, ensuring durability and optimal performance in demanding operating conditions. This O-ring is essential for maintaining system integrity and preventing fluid loss in compatible machinery.