Enhance your DIY aircraft projects with these model airplane propellers. Designed for educational purposes, they are practical for classroom activities and science fairs. The durable, fold-resistant material ensures they can handle repeated use, making them a choice for students and hobbyists looking to explore the principles of flight. Features -Color:Black -Material:Plastic -Size:14.50X3.50X2.50cm/5.70X1.38X0.98in -Optimized for stability: these precisioncrafted propellers reduce vibrations during flight, ensuring smoother operation and better control for model aircraft enthusiasts -Educational value: designed for science classes and diy projects, this kit inspires creativity and fosters a deeper understanding of air principles among students -Foldresistant design: the durable construction prevents bending or breaking, making these propellers reliable for extended use in various flying conditions -Supports team collaboration: practical for group projects, this set encourages teamwork and innovation, making it ideal for classroom or club activities -Universal fit: compatible with multiple airplane models, these propellers provide versatility for both novice builders and experienced hobbyists Package list: 20 x (hole diameter 6x4mm) 20 x