This MILITARY USA seal is a perfect fit for the 2.5-ton truck M35A2 pinion and transfer case input/output. The seal is made of rubber steel material with a matte finish and fits securely onto the vehicle without any issues. It has a manufacturer part number of 5330-00-143-8666 and an OE/OEM part number of 7521241. This seal is not a vintage part and has not been superseded by any other part number. It comes as a single pack and does not have any manufacturer warranty. The seal has been interchangeably used with CAGE 19207 and is custom-made to fit the pinion of the vehicle. This product has universal fitment and works best for non-performance purposes.