Grill zone, universal fit, porcelain coated steel heat distribution plate, distributes heat evenly for improved gas grilling, easy to assemble & install, replaces lava rock & rock grate, helps control & reduce flare ups & enhances the flavor of food, fits gas grills with single or dual control burners, easily adjusts to fit most gas grills, improves burner performance & extends the life of your burners, porcelain coating resists rust & corrosion, provides outstanding heat distribution & temperature control, angled design aids in grease drainage, extends from 10.25" to 25".