There are 4 rainbow brushes in this package.
If you have any question on how to use these brushes, let me know some how and I'll try to give you some pointers.
Rainbows aren't difficult to create, but having these brushes will be a big time saver.
Discover how you can make a rainbow the "GIMP way"
by using this easy to follow GIMP tutorial... How to Make a Rainbow in GIMP [link]
My Gimp Brush Gallery