This expansion plug is designed to fit Cummins engines K19, K38, and K50, as well as QSK NT14 and NT855 models. Made in China, these plugs are a reliable choice for expanding your heavy equipment's fuel system.The plug is compatible with a range of heavy equipment parts and accessories, making them a versatile addition to your toolkit. Whether you're a professional in the business and industrial sector or a DIY enthusiast, these expansion plugs are a must-have for anyone who needs to maintain their equipment's fuel system.