The Kubota W21CS06604 is a genuine OEM oil seal, precisely engineered with an inner diameter of 21mm, an outer diameter of 37mm, and a thickness of 7mm. This high-quality sealing part ensures optimal performance and prevents leaks in a wide range of Kubota engines and agricultural, construction, and utility machinery, including B-series tractors, RTVs, and excavators. Designed for durability and perfect fit, it is a critical component for maintaining engine and transmission integrity.