The John Deere CQ27394 O-Ring is a genuine OEM component designed to provide a secure and leak-free seal in various John Deere agricultural and construction machinery. This O-Ring features an inner diameter of 25.4 mm (1.000 in), an outer diameter of 31.75 mm (1.250 in), and a thickness of 3.175 mm (0.125 in). It is crucial for maintaining system integrity across a wide range of applications, including combines, cotton pickers, forage harvesters, sprayers, tractors, and windrowers, ensuring optimal performance and preventing fluid loss.