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".