single gas burner w/ gas hookups that run to the out side caseing. the caseing is a steel shapere which opens up and the bottom half holds the gas burner. The top half is made of two layes of steel and te top, outside layer has many small holes an a handle with a coil around it. Also, the top has rather large letter saying, "HUMPHREY OVAL PAT'D". I've been searcing the web, but no luck. It may be helpful to know that it was found in the family barn which is well of 100 years old.
