【Ideal 】: This intricate and detailed engine model makes a nice for engineering enthusiasts or students interested in mechanical models. 【Material】: Made from quality metal, this stirling engine model is sturdy and designed to last, you get the most out of your purchase. 【Packaging Details】: Each package contains a low temperature stirling engine motor, carefully packaged to it arrives in nice condition. 【Product Dimensions】: With dimensions of 105mmx80mmx80mm/4.13inchx3.15inchx3.15inch, this compact engine model can easily fit on a desk or shelf without taking up too much space. 【Product Type】: This is a low-temperature stirling engine model, suitable for educational purposes or as a unique display piece.