Product review (5 stars): A little smaller than the older cast iron units, but still great for Model 22401.
19 1/16 in. x 10 9/16 in. are the actual dimensions of the length and the width. I don't at all understand the dimensions given in the Product Description. Since Amazon has such a great return policy, I ordered it anyway based on the picture of the unit and the style of the electrical connection. My unit has on its metal tag, "Model 2240181" with no spaces. I learned later that the "81" is an engineering code, and I actually have a Model 22401. However, it's old enough that I didn't easily confirm that this cartridge is compatible, but again, the picture and the electrical connection looked good. As it turned out, this unit is about a half inch shorter in length and width than the older cast iron cartridge I was replacing. This means, it's a quarter inch smaller on all sides. The older cartridge had caused some scratching at the perimeter, but after some cleaning and shining, the half-inch on all sides that the older cartridge covered, looks fine.

You also might be interested in hearing of my experience with the Jenn-Air customer service. As I said, the metal tag on my Jenn-Air says "Model 2240181." I also needed to buy a control switch, also called an infinite switch. The smaller element was stuck on high. That didn't bother us with the older cartridge, since we didn't use that element often. Now, with the new cartridge, we wanted to use both. I contacted Jenn-Air's support via Live Chat on the Internet. The lady was very polite, but of no help. She could not find Model 2240181 anywhere in their system. She gave me a telephone number for a company they recommended for parts. I called and they also were no help. They tried, had me on hold while they researched it, and again on hold while they researched it some more. They could not find Model 2240181. They were fairly convinced that I was looking in the wrong place for the model number. She suggested that I must be looking on the blower motor. So, I did an Internet search and found the switch that the site said was compatible, but it was for "Model 22401." I contacted Jenn-Air again via Live Chat and got a different representative. He seemed to be more knowledgeable. He told me that the "81" at the end of my model number was probably an engineering code, and that I did have a Model 22401.

We are very happy with the cartridge and may buy another to replace another cast iron cartridge.