The original HQ carbon composite props are a nylon/carbon blend. They offer higher RPM ability and are much stiffer than their nylon counterparts. Perfect for 2000 kv+ motors on 3s in 250 frames.
They're now available in colors, which use a nylon/fiberglass blend, still stiffer than nylon but not quite as stiff as the carbon blend props. The added flexibilty can be a plus in the the winter when props break easier due to the cold .
Now in packs of 4 (2 standard and 2 reverse props per package)