Designed for DIY enthusiasts and students, these model aircraft propellers are suitable for science projects and hands-on classes. Made from durable plastic, they ensure performance and reliability. These propellers are compatible with various model airplanes, making them a versatile addition to your toolkit. They help users understand the principles of aerodynamics and flight. Features -Color:Red -Material:Plastic -Size:14.50X3.50X2.50cm/5.70X1.38X0.98in -Inner hole: 4x6mm -Robust construction: made from durable plastic, providing stability and durability for safer and more reliable model aircraft flights -Balanced design: precisely crafted to ensure propeller balance and exceptional flight performance, enhancing agility and stability -Student friendly: easy to use, suitable for students' projects, promoting hands-on learning and creativity -Repair way: effectively addresses issues of or lost propellers, restoring your model aircraft to normal flight and extending its lifespan -Versatile application: suitable for outdoor flights, model displays, and scientific experiments, meeting various needs and maximizing the potential of your model aircraft Package list: 20 x Model aircraft propeller 5 x tail hooks