The Sunstone Grill Professional Series (SUN5B-IR-LP) 42-inch 5-burner built-in gas grill features all 304-grade stainless steel construction, seamless edging, and eye-catching display. The Sunstone SUN5B-IR-LP features Sunstone's exclusive True Flame Burners, which offers the highest industry "I" Burner rating of up to 20,000 BTU's per burner and a 15,000 BTU infrared rear backburner with (included) rotisserie kit. The SUN5B-IR-LP allows for better gas flow, and even heat distribution with the 11-gauge flavorizors which radiate the heat more evenly across the cooking surface. The Sunstone Grill SUN5B-IR-LP comes with five(4) 304-grade, 11-gauge stainless steel fabricated I-Burners with 100,000 BTU's that are equipped with a reliable push-button electronic ignition system. The grill knobs of the SUN5BIR-LP feature a signature-style red rubber surround which makes gripping the knobs easy and precise. The cooking grates on the SUN5B Sunstone Grill are constructed of 304-grade 3/8-inch solid rod stainless steel, perfect for searing steak and getting steakhouse quality sear marks.