Feature:1. The product is suitable as for middle school physics experiment teaching instrument2. Used to explain the basic structure and working principle of 4 stroke single cylinder diesel engine3. Provide two ways of use, manual or battery connected to the power supply4. This model is already assembled, no need to install by yourself, more easy to use5. Come with compact design, easy to demonstrate, which make students understand betterSpec:Item Type: Gasoline Engine ModelMaterial: Engineering plasticFunction: Used to explain the basic structure and working principle of four stroke single cylinder diesel engine.Size: Length: Approx. 29.3cm / 11.5in, Width: Approx. 16.7cm / 6.6in (manual measurement, for reference only)Battery Model: 2 x AA batteries (not include)Package List:1 x Gasoline Engine Model