4 Sealed Gas Burners. Backguards Must Be Ordered Separately. Shown With Optional 4" Stub Back. Our Performer Series 30-Inch Slide-In Rangetop With Four Open Gas Burners Offers The Most Powerful And Easy To Clean Open Burner Options. These Are All Ceramic Open Burners Capable Of Heat Up To 25,000 Btus! They Are Easy To Assemble And Disassemble For Cleaning, And Have Dedicated Pins For Each Size, Making It Easy To Quickly Identify Where Each Burner Head Goes.