Unicook Barbecue Heat Plate, Heavy Duty Adjustable Porcelain Steel Heat Shield, Gas BBQ Replacement Parts, Length Extends from 29.8cm up to 53.3cm, 4 PackExtend from 29. 8cm up to 53. 3cm length, 9. 5cm width, fits most gas barbecue grills. If installed reversely, the length will be extended from 29. 8cm to 46. 5cm only. Protect gas burners and prevent flare ups, prevent direct exposure to flame and distributes heat evenly. Replaces heat plates for side to side and front to back burners. Hardware included, easy to install. Heavy duty 18 gauge porcelain steel construction. Thicker is better; longer