These large propellers are an excellent choice for anyone looking to into the world of model aircraft construction. They are ideal for DIY projects, providing a hands- to learning about aerodynamics and flight mechanics. The propellers are designed to be and reliable, ensuring they can be used in multiple projects without compromising performance. Features -Color:Orange -Material:Plastic -Size:18.00X3.00X2.50cm/7.07X1.18X0.98in -Practical learning: offers a practical approach to learning, helping children understand the mechanics of flight through hands on experience -Creative expression: encourages creative expression by allowing children to design and build their own model airplanes -Sufficient supplies: comes with ample supplies to complete several projects, providing great value for money -Universal propellers: the large propellers are universally compatible with various model airplanes, making them highly practical - design: constructed from plastic, these parts are designed to withstand regular use and handling Package list: 5 x (hole diameter 6x4mm) 5 x tail hooks