The Welger 1121140220 is a genuine OEM shaft seal designed for optimal performance in Welger RP series round balers. This high-quality oil seal features an inner diameter of 40mm, an outer diameter of 52mm, and a height of 7mm. Constructed from durable NBR material with a dust lip, it provides effective sealing against contaminants and prevents oil leakage, crucial for maintaining the efficiency and longevity of your agricultural machinery. It is a direct replacement for the original Welger part number 1121.14.02.20.