The product is a heavy-duty truck engine temperature regulating valve manufactured by Cummins. It is a thermostat made in Israel, designed to regulate the temperature of the engine to ensure optimal performance. This high-quality part is specifically tailored for industrial use, making it a reliable and durable choice for truck engines. With the model number 3928639, this Cummins thermostat is an essential component for maintaining the engine's temperature control system in heavy-duty trucks.