This oil filler cap is designed to fit Cummins engines N14 L10 M11 ISM N855 NT855 with precision. It is an OE/OEM part number 101322 and is manufactured in China. This high-quality cap is perfect for those looking to replace their old or damaged oil filler cap. It is compatible with various Cummins engines and is a must-have for anyone who wants to maintain their engine's performance.