A few days ago I was having some work done at my local garage.
A blonde came in and asked for a seven-hundred-ten. We all looked
at each other, and another customer asked, "What is a seven-hundred-ten?"
She replied, "You know, the little piece in the middle of the engine,
I lost it and need a new one. It had always been there."
The mechanic gave the blonde a piece of paper and a pen and
asked Her to draw what the piece looked like. She drew a circle
and in the middle of it wrote 710. He then took her over to
another car which had the hood up and asked, "is there a 710 on
this car?" She pointed and said, "Of course, its right there."
This is what she wanted
http://photos.napalm.net/710.jpg