A team from the Department of Mechanical Engineering, College of Engineering, Anbar University, was able to manufacture a thermal performance test device for jet collision, and they are both Assistant Professor Dr. Muhammad Abdul Ahmed Al-Tadrisi in the Department of Mechanical Engineering and graduate / master's student Saad Mutlaq Hatim in the Department of Mechanical Engineering within the study that was presented as one of the requirements Obtaining a master's degree for the student. Jet collision is considered one of the best techniques to particularly achieve improved heat transfer. It is used in many engineering applications, the most important of which is cooling of electronic devices, and this device is subject to the required specifications related to achieving the characteristics of flow and heat transfer (the subject of the master's research) in addition to examining the thermal performance evaluation coefficient in jet collisions using four test models for the surface of the collision target.