1、Stainless Steel: The internal combustion engine model theme is made of premium stainless steel, which is resistant to oxidation and corrosion, and can be stored for a long time. 2、Scope of Application: This single cylinder internal combustion engine model is used or children's science projects, physics and mechanics learning, classroom presentations, etc. 3、Teaching Instrument: This is an instrument and equipment used for classroom experiment display, which enables students to understand the experimental process more intuitively. 4、Gifting Choice: This internal combustion engine model kit is beautifully crafted and also a birthday gift for friends, family, parents, kids, and more. 5、Packing List: This teaching use internal combustion engine model kit includes diesel engine, stainless steel cover, hex wrench, screws, stainless steel rod. Item Type: Single Cylinder Internal Combustion Engine Gross Weight: 1275g / 45.0oz Product Size: 31x16x13cm / 12.2x6.3x5.1in Material: Stainless steel, aluminum Scope of Application: For children's science projects, physics, mechanical learning, classroom presentations, etc. Battery Specifications: Two AA batteries are required (not included in delivery) 1 x Diesel Engine 1 x Stainless Steel Cover 1 x Hex Wrench 2 x Screw 2 x Stainless Steel Rod