Designed for compatibility with fuel injector nozzles in diesel engines commonly found in , GM Duramax, and applications Made from temperature resistant fluoroelastomer (FKM) to maintain sealing integrity under prolonged exposure to fuel, heat, and pressure engineered to match OEM specifications for inner diameter, outer diameter, and section dimensions of 0000780580 Supports proper fuel atomization and prevents leakage between the injector nozzle and cylinder head mounting Fits as a direct replacement for worn or damaged seals during routine injector service or engine rebuild procedures, Manufacturer: RmyTKyfAD