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 standard props are made from ABS plastic with a glass fiber fill for extra strength and durability, and come in Black, Green and Orange colors.
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.