The Zetor 974437 is a genuine NBR (Nitrile Butadiene Rubber) O-ring designed for sealing applications in Zetor agricultural machinery. It features an inner diameter of 20 mm and a thickness of 2.5 mm, ensuring a reliable seal against fluids and gases. This durable O-ring is an essential component for maintaining the integrity of hydraulic and pneumatic systems, preventing leaks and ensuring optimal performance of Zetor equipment.