Stirling Engine Kit Full Metal with Mini Generator Steam Science Educational Engine Model Toy.    Significance and Value of Use:  The product can be used as a decoration with collectible value. The principle of the Stirling engine model is intuitive. It can be used as an educational toy to help develop children's interest in learning. It can also be used as a teaching experiment device for classroom use. , Simple and convenient, entertaining and fun, through the hands-on operation, a more intuitive understanding of the principles of the Stirling engine model.    Specifications: Item Name: Stirling Engine Kit;  Material: Metal;  Product Dimensions: 10.8 x 7 x 7.8cm;  Weight: 450g;  Package Dimensions: 13 x 9 x 10cm;  For Age: 8 years old and above;    Product Parameters:  Overall Machine: length 108(L) x 70(W) x 78(H)mm;  Number of Cylinders: 2;  Bore Diameter x Stroke: 10mm x 10mm;  Speed: 3700-4000 rpm;  Flywheel Diameter: 36mm;    Features: - This Stirling engine model adopts T-shaped rocker crank α structure, which has the characteristics of high power and high speed;  - The moving parts of the whole machine are inlaid with rolling bearings, and the friction coefficient is low;  - The cylinder piston is precision ground with SUJ-2 alloy steel, with clearance Precision, high hardness and good wear resistance;  - The overall connection is fixed by screws, all connection parts are sealed by copper pads, and the performance is reliable and high temperature resistance;  - High-density aluminum alloy heat sink, higher heat exchange rate;  - Base with double-layer spring shock absorption, Smoother operation;  - All-metal material, ultra-small size, compact structure, high reliability;  - Industrial-grade processing level, creating an all-metal exquisite model, unique and innovative, is a novel fashion gift and collectible;  - The whole machine is assembled by more than 150 small parts, including 12 rolling bearings, 30 stainless steel bolts, etc; - The appearance parts are made of 6061 Sandblasted and oxidized surface of CNC aluminum alloy after processing.      Package Included: 1 x Stirling Engine Kit