There are 7 brushes in this set. 2 butterfly fairy wing brushes, 2 fairy wing brushes and 3 feathered or angel wing brushes.
Each brush is a left wing. To get the right wing, simply duplicate the layer with the wing on it then transform it to where you need it, either by Distort or Flip Horizontal. Check out the free tutorials on my website to learn all you need to know about how to do digital fairy wings.
Please feel free to ask any questions you might have.