This product is a 3-blade electric propeller designed specifically for the E-flite P-39 Airacobra 1.2m RC aircraft. It features an 11 x 8.5 size configuration that provides a balance of thrust, efficiency, and scale appearance for warbird flight performance. The three-blade design improves airflow and delivers smoother power transfer compared to standard two-blade props, while maintaining stable operation. It is built as a direct replacement part to ensure proper fitment and consistent performance with the factory power system.