The Niemeyer 551028 Piston Seal is a high-quality, genuine replacement component specifically designed for hydraulic cylinders in Niemeyer agricultural machinery. With precise dimensions of 40 mm inner diameter, 50 mm outer diameter, and 8 mm height, this seal is crafted from durable polyurethane (PU) to ensure reliable and long-lasting sealing performance. It effectively prevents hydraulic fluid leaks and maintains optimal system pressure, crucial for the efficient operation of various Niemeyer equipment.