Product review (3 stars): Frigidaire Dryer Knob 131965300 NEW OEM
What can I say it is a knob just like the old one.  My old ones cracked where they go onto the D shaped shaft.  To reinforce the new ones I found some round spring I cut and pushed on the round plastic hub.  I am rating it only 3 star because I do not see any improvements to prevent the same failure in the future.