Designed for model aircraft enthusiasts, these rubber band-powered accessories enhance the performance of gliders and helicopters. The propeller are crafted to optimize wind force, ensuring smooth and efficient work. suit for science education projects, they offer a hands-on learning experience in aerodynamics and engineering. Features -Color:Blue -Material:ABS -Size:18.00X3.50X2.50cm/7.07X1.38X0.98in -Rubber band power system: designed for model airplanes, the rubber band power system enhances flight stability and extends gliding time for a smoother and longer flying experience -Optimized aerodynamics: specially crafted compatible for thunderbird gliders, the accessories improve aerodynamic efficiency, enabling greater flight distances performance -Enhanced helicopter propellers: compatible with tiger helicopters, the propeller parts boost power output, ensuring work in complex flying conditions -Highefficiency fan : the advanced fan design minimizes air resistance, increasing flight efficiency and making it ideal for outdoor flying competitions -Universal compatibility: these accessories are compatible with various model airplanes, allowing quick and easy replacement to meet diverse performance needs Package list: 50 x Model Airplane Propellers