The Weber Summit S-420 is one of the stainless steel grills in the Weber Summit Series, which is a gas based grill series. There are also colored Summit grills. The stainless steel Summit grills come in two versions; the 6 burner version and the 4 burner version. The S-420 belongs to the latter group. Although it has fewer burners, it shares many of the same features as the 6 burner grills. Each of the S-400 grills is also very similar to each other and just has very slight differences. The S-420 comes with a Weber cookbook, a limited warranty, and has many fantastic features such as 48,800 BTU-per-hour input, a 12,000 BTU-per-hour input flush-mounted side burner, a Snap-Jet™ Individual burner ignition system, and many other features.