The "Infrared Side Burner Cooking Grid" is a component used in grills, specifically designed for models like the LEX 485 and Prestige 450/500/665 Gas Grills. This cooking grid is made from stainless steel and is used for grilling and cooking on the infrared side burner of your grill. If you need to replace or upgrade the cooking grid on the infrared side burner of your grill, this product is designed for that purpose. Stainless steel grids are known for their durability and are easy to maintain, making them suitable for grilling. To replace or upgrade the cooking grid, you would typically follow the instructions provided in your grill's user manual or installation guide. It's important to ensure that the replacement grid is compatible with your specific grill model, which in this case, is designed for the LEX 485 and Prestige 450/500/665 Gas Grills. If you have any doubts or questions about the installation or compatibility, it's advisable to consult the product manual or contact the manufacturer's customer support for assistance. They can provide you with guidance and ensure that you select the right replacement part for your grill.