Garlock Klozure Guardian Bronze Labyrinth Seal, Part Number 29609-1379, 1" ID x 2" OD x 3/8" Tall (no flange). This is a bearing isolator that replaces the traditional rubber lip seal. Please visit http://www.arthomson.com/Literature/brochures/bearingisolators-oilseals/Klozure/Bearing_Isolator_Family.pdf for further details.
I have (4) of these that are new and in the original packaging. I am selling these at less than 1/2 the normal price.
Picture added 9-24-2012. I opened one of the boxes to take a picture of the actual part for youre reference. Each box comes with a seal assembly and packet of assembly lube (petroleum jelly). Also added part number 29609-1379