GemFan produces some of the finest propellers for Multi-Rotor use, and they are available in a variety of colors and materials. All of the different sizes are available in both normal and reverse rotation as needed for use in multi-rotor craft. The High-Strength props are are made from Nylon with Carbon Fiber fill for an extremely stiff blade that will not deform under load. These props are about 10 times stiffer than the normal GemFan Multi-Rotor props.
The 8x4.5R props have a 5mm hole drilled in the hub, so they are ready to bolt on most 22mm motor prop adapters. Also included with the prop is a set of 3 adapter rings that step down the center hole of the prop to allow it fit on 3mm, 3.17mm or 4mm motor shafts. If you have a larger threaded shaft on your prop adapter, the center hole can be reamed out to 6mm or 1/4 inch as needed.