The Kubota W21CS08904 is a genuine OEM oil seal, also known as a crankshaft oil seal (Joint SPI). This critical sealing component is designed to prevent oil leaks and maintain optimal engine performance in a wide range of Kubota equipment. With precise dimensions of 25mm inner diameter, 40mm outer diameter, and 7mm thickness, it ensures a perfect fit and reliable sealing. This oil seal is compatible with Kubota D722 and D902 engines, and various models including BX23, B2320, B2620, B2920, B7510, B7610, B7800, GR2100, GR2110, GR2120, RTV900, and ZD28 series machinery.