A Blonde goes into an auto parts store and asks for a seven ten cap.

All the service guys looked at each other and said, "What's a seven ten cap?"

She said "You know, it's right on the engine? Mine got lost some how and I need a new one."

"What kind of a car is it on," they asked? Thinking maybe it's off an old Datsun Seven Ten, but no, she said its a Chrysler.

"OK lady, how big is it?"

She makes a circle with her hands about 3-1/2 inches in diameter.

What does it do?," they asked. She said, "I don't know, but its always been there."

One of them gave her a note pad and asked her if she could draw a picture of it. So she makes a circle about 3-1/2 inches in diameter and in the center she writes 710.

The guys behind the counter are looking at it upside down as she writes it...and they fall down behind the counter laughing so hard in hysterics.