These large propellers are a must-have for any model airplane kit, providing a crucial component for DIY projects and educational activities. They are designed to be easy to assemble and use, making them suitable for both beginners and experienced hobbyists. The propellers help users understand the mechanics of flight, providing a practical and engaging way to learn about aerodynamics. Features -Color:Orange -Material:Plastic -Size:18.00X3.00X2.50cm/7.07X1.18X0.98in -Learning aid: a great aid for learning, this kit helps children understand of flight and aerodynamics through practical application -Creative building: promotes creative building and problem solving skills, allowing children to experiment with different designs -Ample components: provides a generous amount of components, ensuring that children have everything they need for multiple projects -Versatile propellers: the large propellers are versatile and can be used with various model , adding to their functionality - parts: made from plastic, these parts are designed to last, ensuring they can withstand regular use and handling Package list: 5 x (hole diameter 6x4mm) 5 x tail hooks