Product Type Fire pit table Exterior Material Steel Burning Area Material Stainless Steel Fuel Type Propane; Natural gas (Natural gas conversion kit is NOT included with fire pit due to regulation reasons. Customers need to buy it separately for conversion.) Ignition Type Push-button BTU Output 50000 BTU Compatible Filler Type Lava Rocks Durability Rust Resistant; Heat Resistant Compatible Fuel Size 20 lb. Fire Bowl: 4'' X 23.2'' W X 7.48'' D Note: Natural gas conversion kit is NOT included with fire pit due to regulation reasons. Customers need to buy it separately for conversion.