These products are fully stainless steel. They run on propane and can go from 7000 BTU for the Go version to 8500 BTU for the standard Inferno, to an amazing 15,000 BTU for the Double Gourmet version. These things can cook your average thickness steak to medium-rare in just one minute per side. You can cook many different size and thickness steaks they may just adjust the timing a little. These grills include a drip pan so you can catch your delicious drippings and pour them back over the top of your steak at the end several high end steak houses. This products produces a delicious steak in a quick an easy fashion. It it a must have for the steak aficionados out there.