Product review (2 stars): Not a good fit
I purchased 4 of these knob after doing a ton of research.  Most websites stated 71001641 would fit my CG206B Jenn Air Stove top.  They do not.  My stovetop requires a push turn process in order to turn the burners on.  These go on fine and will work the front burners but they will not work the back.  A longer middle area is required so you can push down and no where on this site tells you the measurement of the product.  I'll keep these for spares since they tend to break frequently but will call Jenn Air customer service and try to find the correct replacement.  This has been an extremley frustrating process.  Even the Jenn Air book does not list the original part numbers for replacement.  My 2 rating is for the inaccurate, lack of dimensions & no back picture on the website.  The knobs themselves are made of a hard plastic and the white Off, Lo, Med, Lite Hi does not come off after many washings.
Update:  I talked to Jenn Air.  They said the part number I received was correct and I must not know how to put on the knob because I was the only one that complained.  I guess I'll have to keep using my plyers to turn on my stove or get a new stove because of one knob.
Update:  I was able to fix my problem and thought I would share in case others are having the same issue.  I solved it by purchasing some Sugru.  I took small pieces of Sugru and placed inside the hole of the shaft tapping it down by using the eraser of a pencil.  Once the Sugru cured in 24 hours it becomes hard like rubber and allowed the knob to sit up higher. The knob can now be pushed down and turned.  Hooray for Sugru and no more plyers.