The 4 MM CS X 121 MM ID PTFE White O-Ring from Freudenberg-NOK is a specialized sealing solution designed for high-performance applications. With a cross-section of 4 mm and an inner diameter of 121 mm, this O-ring is crafted from PTFE, known for its exceptional chemical resistance and low friction properties. This makes it ideal for use in environments where traditional materials may fail. The white color indicates its suitability for food-grade applications, ensuring compliance with safety standards. This O-ring is a reliable choice for professionals seeking effective sealing solutions.