Product review (5 stars): Get this OEM one, not a knockoff!
This is the second Infinite Switch I replace on our 30+ year old Jenn-Air S125. The first one I bought was a universal generic one. It worked, but installation required cutting the control stem to the proper length and then using a plastic adapter to fit the original knob (this was a hassle and was a close but not perfect fit). That one worked, but this one is the exact factory replacement. No cutting, no adapters, just a perfect fit. (FYI Whirlpool is made by the same company as Jenn-Air, just a different make). Entire installation took 5 minutes. Don't waste your time buying a knock off. Get this one!