If you need this part, you probably also need the Rainbow Brush Roll Bearing Boot. I had to come back and order some separately because I expected them to be included with the Brush Roll Bearing Retainer Shield.
Here's the link for the part that goes inside: http://www.goodvac.com/Brush_Roll_Bearing_Boot_p/r-prt-r5592.htm
You need both parts of this for it to work! 
