Product review (2 stars): Functional but....
The knob has the right shape in the back to fit in place and make the dryer functional, but it is clearly not the same material, style or quality as the knob it is replacing.  It is generic and too big for the allotted space so it sits on the  peg kind of wonky .... but it functions, and is better than using a pair of pliers to make the dryer start so it is what I was doing before, and it was cheaper than paying thirty bucks for a knob from a Frigidaire man.

So the moral of the story is I got what I paid for, a cheap replacement part.