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 durable 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 durable plastic, these parts are built to withstand frequent use and handling Package list: 10 (hole diameter 6x4mm) 10 x tail hooks