This set of model airplane propellers is practical for students engaging in scientific DIY projects. The propellers are designed to be durable and fold-resistant. Ideal for hands-on learning, these parts help students understand the mechanics of flight and aerodynamics, making them a great addition to any educational tool. Features -Color:Black -Material:Plastic -Size:14.50X3.50X2.50cm/5.70X1.38X0.98in -Lightweight material for efficiency: crafted from lightweight materials, these propellers enhance flight efficiency, ensuring smoother and more stable performance for model airplanes -Designed for educational projects: practical for student science experiments, this diy kit encourages hands learning and sparks interest in aviation technology among young learners -Precision engineering for stability: each propeller is precisely balanced to minimize vibrations during flight, improving stability and extending the lifespan of your model aircraft -Versatile compatibility: suitable for various model , this set caters to both beginners and advanced hobbyists, offering flexibility for different usage scenarios -Ideal for group activities: designed to meet classroom or needs, this kit promotes collaboration, creativity, and innovation among participants Package list: 10 x (hole diameter 6x4mm) 10 x