Offers Superior Protection Against Dirt and Water. It is manufactured with high-quality tested design and materials for a correct fit. Features deep drawn sheet steel is used that creates a rigid, stress resistant metal case. Gator springs use cold drawn steel wire for superior fluid retention. Measurements (Inch): Outer Diameter: 2. 754 - Width: 0. 313 Bore: 2. 750 - Shaft: 1. 875 - Boretite: Yes. SKF has long been a leader in the design and development of seals, inventing the first integrated shaft seal in 1928. Since then we have continually pioneered new designs and bonding techniques. Our seals are made to specific designs using premium materials to ensure the seal has the correct properties for both the application and it's environment. SKF seals have been on the road for more than a hundred years, keeping lubricants in and contaminants out. SKF products are designed and manufactured to the highest quality standards, ensuring long life and safety.