The John Deere 48M3994 Seal Ring, also known as an O-Ring, is an authentic OEM component designed for a wide range of John Deere agricultural, construction, and utility equipment. With an inner diameter of 25 mm and a cross-section of 2.5 mm, this precision-engineered seal ensures a tight, leak-free connection, crucial for maintaining optimal performance in hydraulic systems, transmissions, and other critical applications. Manufactured to John Deere's rigorous standards, it guarantees durability and compatibility, preventing fluid loss and protecting internal components.