The Kubota W21CS06606 is a genuine OEM oil seal designed to prevent lubricant leakage and protect internal components from contaminants. Manufactured to Kubota's stringent quality standards, this sealing part ensures a precise fit and reliable performance in compatible Kubota engines and equipment. It features an inner diameter of 40mm, an outer diameter of 66mm, and a thickness of 8mm, making it crucial for maintaining the integrity of rotating shafts and housings in models such as the B2620, BX1870, RTV900, and engines like D722, D1105, and V2203.