Unicook Universal Replacement Heavy Duty Adjustable Porcelain Steel Heat Plate Shield, Heat Tent, Flavorizer Bar, Burner Cover, Flame Tamer for Gas Grill, Extends from 11.75" up to 21" L, 3 PackExtends from 11. 75 up to 21 long, 3. 75 wide, fits most gas grills. If installed reversely, the length will be extended from 11. 75 to 18. 37 only Prevents flare ups and protects burners to prolong life, prevents direct exposure to flame and distributes heat evenly Replaces heat tents for side to side and front to back burners. Upgraded Stainless Steel M5 bolts and wing nuts are included, easy to install Thickness of porcelain steel is 1. 2mm, heavy