Product review (3 stars): By Whirlpool?
Knob is advertised as "By Whirlpool" in the description but I'm not sure this is actually an OEM Whirlpool knob to be able to indicate "By Whirlpool".  My original knob from my Whirlpool dryer has "FSP" as the brand and some numbers indicated on the back of the knob.  This new knob I've received has no lettering or numbers on the back,...completely blank.  In comparing my original knob with this new knob, I notice the plastic shaft on the back of the new knob is slightly smaller in diameter than the original knob.  Hopefully this will not be an issue going forward.  Finally, the knob arrived in an "Exact Replacement Parts" (ERP) brand bag.  Researching ERP on the Internet, ERP on their website refers to their company as an aftermarket parts company in contrast to an OEM parts company.  Sooooo,..."By Whirlpool" seems to be inaccurate, unless ERP is a Whirlpool company, that I'm unaware of.  If it is, I stand corrected now.  Anyway, FSP seems to be more closely aligned with actual Whirlpool parts such as indicated on the back of my original knob and as I've seen FSP mentioned elsewhere on the Internet as being associated with OEM Whirlpool parts.  Apart from the differences mentioned above, the new knob appears to be very close in look, fit, and quality to the original knob.  In addition, the price was good.  Now to see how it works over time, as an aftermarket part.