The Grainger 14D389 is a 14-inch diameter, 3-blade, aluminum propeller for small unmanned aerial vehicles (UAVs). It has a pitch of 8 inches and is designed for electric motors up to 250 Kv. The propeller is made from durable 7075 aluminum alloy and uses a collet-style hub to mount on a motor shaft up to 5mm in diameter. With its lightweight design and optimized blade shape, this propeller can provide high static thrust and is well-suited for multirotor drones and other small UAV applications.