The DENSO 0961800120 is a genuine OEM O-Ring, precisely engineered for sealing applications in common rail fuel injector systems. Made from durable FKM (Viton) material, it provides excellent resistance to fuel, oils, and high temperatures, ensuring reliable and leak-free performance. This O-Ring is a critical component used across a wide range of agricultural and industrial machinery, including models from John Deere, Kubota, Case IH, New Holland, and Massey Ferguson, to maintain optimal system integrity.