Description. Receive one our most popular fire pits, The Yellowstone, in record time. BTUs: Up to 280,000 BTUs. Material: 3/16″ Mild Steel. Finish: Steel Charcoal Textured Powder Coating. Burner: Crossfire Brass Burner System by Warming Trends. Flame Height: Adjustable via Key Valve and Whistle-Free Flex Line Kit.