Product review (5 stars): Glad I found these!
These are great! We have an old JennAir cooktop and one of the knobs broke.  Another reviewer mentioned that after several years, the knobs will start to go so it's wise to get all 4 knobs.  That I did and am very pleased.  They fit great, look good and feel the same as the old ones.  Same quality as what I had on there previously.