This high-performance fuel injector is designed for use with Cummins ISX15 and QSX15 diesel engines. It comes with a variety of mounting styles, including screw-on, screw-in, and bolt-on, ensuring compatibility with a range of vehicles. Each unit includes one piece injector with a copper washer installed, and the connector color and type are as shown in the picture. You can be confident in the quality of this product.