Description: 100% Brand new and high quality Transparent shell, help to observe progress and understand physical rules Great accessory for DIY mini motor, reduction gear box, light bulb and LED lamp etc. Material: Plastic Color: Transparent blue Size Chart: Size: approx. 60 x 30 x 25mm/2.36 x 1.18 x 0.98inch Package Includes: 1 Piece Hand Crank Generator
