Exterior Material Aluminum; Wicker Exterior Material Details Rustproof aluminum and wicker 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.) BTU Output55000 BTU Burning Area Material Stainless Steel Note: Natural gas conversion kit is NOT included with fire pit due to regulation reasons. Customers need to buy it separately for conversion.