The Grainger 170FT7 is a 7-inch diameter, 3-blade, aluminum propeller for small unmanned aircraft systems weighing less than 55 pounds. It has a pitch of 4.7 inches and is designed for electric motors with a max power of 4 kW. The propeller is constructed from durable 7075 aluminum alloy and uses a collet-style hub to mount on a motor shaft from 6mm to 10mm in diameter. It can reach speeds up to 15,000 RPM. Overall, this propeller provides high performance for small UAVs and drones.