Dual-propulsion steam engine model: Features a unique dual propulsion system where steam control is achieved by adjusting the valve, allowing for alternating intake air from both ends of the cylinder to effectively operate the piston. Transparent design elements: Certain parts are designed with transparency, enabling complete observation of the working details from all angles, ensuring no blind spots. Comprehensive component assembly: Constructed with a cylinder, piston, steam chamber, steam flow reversing valve, crank connecting rod mechanism, flywheel, bracket, and bottom plate. Enhanced visibility: The use of transparent plastic for the cylinder and steam chamber facilitates clear observation of the piston movement and steam flow reversing valve in action. Adjustable steam passage: A steam passage above the cylinder connects to the steam chamber, which incorporates a steam pressure regulating mechanism to adjust the operating speed, featuring a durable cast iron flywheel.