Sold as a pair of props.
I purchased these with the Emax GT2812 1840KV. Running on 3s these propellers cannot handle anything over 80% throttle. The blades flatten out and make extremely loud noise and no thrust. If you were running 2s on this motor it would be fine. I would guess you wouldn't want to use anything over 1400kv on 3s with these blades. This is more about the material these are made from. They are great props for what they were made for, just fyi before you buy.