The large propellers included in this set are essential for model airplane enthusiasts and hobbyists. They are designed to be used in various DIY projects, providing a realistic touch to model aircraft. The propellers are made from materials, ensuring they can withstand the rigors of repeated use, making them ideal for both beginners and experienced builders. Features -Color:Orange -Material:Plastic -Size:18.00X3.00X2.50cm/7.07X1.18X0.98in -Hands on learning: ideal for educational purposes, this kit promotes hands on learning and practical application of scientific principles -Creative projects: encourages children to engage in creative projects, enhancing their problem solving skills and innovative thinking -Multiple uses: includes a variety of parts that can be used for different model airplane projects, providing great value -Versatile propellers: the large propellers are compatible with a wide range of model airplanes, making them highly versatile - : constructed from plastic, these parts are built to withstand frequent use and handling Package list: 5 x (hole diameter 6x4mm) 5 x tail hooks