Product review (1 stars): NOT AS DESCRIBED
The knob that I received is not the one described or shown.  The knob was described as "has a red indicator line, a diameter of 1-3/4", and a D-shaped shaft.  What I received was a round, white, wheel without a red line (I could deal with that) but does not have a D-shaped shaft so it will not work on the switch.  The item I received would be ok in some cases but would not work on the dryer.