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The 157-3165 20R-2315 171-2613 ECU controller with program is a heavy equipment part designed for various mining trucks, excavators, and other construction vehicles. Specifically, it is compatible with Caterpillar models such as the E312C, E320C, and 330C. This unit is made in China and comes with one controller included. It is a versatile product that offers programming for different heavy equipment models, providing a reliable solution for ensuring optimal performance and efficiency in a range of industrial settings.