This flat maple syrup evaporator pan is built from food-grade 304 stainless steel for durable, rust-resistant performance and efficient heat transfer. It features full-welded construction to help prevent leaks and improve safety around edges and corners. The large 47-gallon capacity supports high-volume sap processing, with an adjustable valve for convenient flow control into other containers. A built-in thermometer helps you monitor temperature to reduce the risk of scorching. Suitable for indoor or outdoor use with wood, charcoal, or propane heat sources.