The Case-IH 378733R1 is an authentic OEM back-up ring designed for use in various Case-IH agricultural and construction equipment. This critical component supports O-rings in hydraulic applications, preventing extrusion under high pressure and extending the life of seals. Manufactured to precise specifications, it ensures optimal performance and reliability within hydraulic cylinders and other sealing environments. This back-up ring is essential for maintaining the integrity of hydraulic systems in compatible Case-IH models.