Product review (3 stars): Be resourceful or do what I did and pay too much but less than the brand.
This replacement dial, Kenmore/Whirlpool 688865, is a smidgen lighter weight than the original but the hole in the stem was reinforced w/ a small metal tube which might be stronger tho the original lasted for about 16 years. Probably because of the metal sleeve in the stem the stem tube is a very tight fit onto the dryer's post. I used liquid detergent to lube the dryer post in order to push the replacement dial stem onto it.  A bargain at $16 compared to the brand name $36-ish dollars  but both are vastly overpriced for a lightweight piece of plastic. I should have looked around for an inexpensive dial with the correct size and shape tube stem and used a Sharpie to mark a line to align with the dryer dial functions.

The seller shipped this quickly via Amazon Prime in a well protected bubble wrap envelope. I appreciate  their selling a replacement dial for an old dryer at 1/2 the price of the brand name.