The Case-IH 381088R1 is a genuine OEM back-up ring designed for use in a wide range of Case-IH agricultural and industrial equipment. This essential component helps to support and protect O-rings in hydraulic systems, preventing extrusion under high pressure and ensuring a reliable seal. Weighing approximately 0.005 kg, it is a critical part for maintaining hydraulic system integrity and performance across numerous tractor, combine, cotton picker, and windrower models.