The Regal™ 400 Series features 3,226 sq. cm primary cooking surface and includes 4 stainless steel Dual-Tube™ burners, illuminated control knobs, reversible heavy-duty cast iron cooking grids, stainless steel Flav-R-Wave™ cooking system, and electronic ignition. The 400 PRO series features stainless steel side shelves, and an enclosed cabinet base. The Regal™ Series 400 features reversible heavy duty cast iron cooking grids. The S 490 IR features 9mm stainless steel rod cooking grids and a powerful infrared side burner.