What does a 'zipper' foot for a sewing machine look like?

Question

I have a Brother programmable sewing/embroidery machine and the different feet each have letters.

Answer 1

http://www.sewingmachinesplus.com/brothe...

http://www.sewingstyle.com/Brother-Sewin...

Answer 2

http://cgi.ebay.com/Brother-Sewing-Machi...

Answer 3

You know how the regular foot has a whole in the middle for the needle?  The zipper foot doesn't have that.  It's thinner, shaped the same on both sides, and you can move it to the right or the left usually.  Your needles pierces the fabric on the side of the needle instead of in the middle.

Most of them look pretty much like this:  http://www.husqvarnaviking.com/us/media/...

Answer 4

The zipper foot has a single movable foot portion; you can slide it one way or the other to do each side of the zipper.