Hi:
I have a Thater 4125/ 2 band bulb size 26 knot. Really like the brush! I would like to buy another Thater brush and was thinking of a 24 size knot as I tried the 22 and I thought it was to small. The question is can anyone tell me the difference between the bulb and the fan. I know this is a subjective question but any input would be appreciated. BTW I face lather. Many thanks,