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 and Green colors.
The 5x3, 3-Blade props have a 5mm hole drilled in the hub, so they are ready to bolt on most 22mm motor prop adapters. The hub on these props measures 6mm thick, and is 11.5mm in diameter. 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.