The Case IH B512721 is a genuine OEM oil seal, precisely engineered with an inner diameter of 40mm, an outer diameter of 55mm, and a width of 10mm. This critical sealing component ensures optimal performance by preventing lubricant leakage in various Case IH and Case agricultural and construction equipment. It is designed for a wide range of applications including tractors, combines, cotton pickers, industrial/construction machines, loaders, skid steer loaders, and windrowers. This part replaces CNH part number 87304190.