Product review (3 stars): The black line indicating which way it is pointing was ...
The black line indicating which way it is pointing was on the wrong side for me.  I had to put a new one on with a sharpie, but unfortunately you couldn't remove the original line.  So I just "x'ed" it out.  Imperfect solution, but this was an exact match for part # so I don't know how you would indicate an opposite orientation.