I ordered it with a Kenmore Rack model number. Another smaller brush I ordered fitted perfectly. The big brush doesn't. I called Sears and was given information about printing a return label. It's not easy because I was connected to India. yes india Imagine my dismay when I received a second floor brush, also the wrong size. Now I have to go through this again to return it and try to figure out why I got a replacement instead of a refund. good luck to me