The Grainger 14U078 is a 14-inch diameter, 3-blade, aluminum propeller for small unmanned aerial vehicles (UAVs). It has a pitch of 4.7 inches and is designed for electric motors with a power range of 100 to 300 watts. The propeller is made from durable, lightweight 6061 aluminum alloy and uses a low noise profile for quieter flight. With its efficient airfoil design, this propeller is well-suited for multirotor drones, RC airplanes, and other lightweight UAV projects needing good static thrust and torque. Overall, the 14U078 is a quality propeller choice for small UAV builds looking for smooth, powerful flight performance.