Weber 7534 Gas Grill Flavorizer Bars (21.5 x 1.7 x 1.7)Patented steel bars create delicious, barbecue flavor Works by vaporizing juices and fats to create smoke Porcelain enameled steel for even heat distribution For use with Weber Spirit 500 and Genesis Silver A grills Flavorizer bars come five in a pack Constructed with porcelain enameled steel for corrosion resistance and long lasting use Patented steel bars create delicious, barbecue flavor Works by vaporizing juices and fats to create smoke Porcelain