The Thomson Industries S250 is a precision-engineered closed external seal designed for fixed diameter housings, featuring a 1/4" inside diameter, 1/2" outside diameter, and a 1/8" width. This seal is constructed with a steel case and a rubber lip, ensuring durability and effective sealing performance. It is specifically designed for use with 1/4" diameter shafts, providing a secure fit and reliable operation. The S250 seal is compatible with Thomson's 4812 and SUPER-4 bearing series, offering versatility in various applications. Its robust construction and precise dimensions make it an ideal choice for industries requiring dependable sealing solutions in linear motion systems.