American Whistle are made of brass and will be used in the 43rd Super Bowl.

Anna Nelson puts whistles on an automatic assembly line for soldering at the American Whistle Corp. in Coshocton, Columbus, Ohio, U.S., on Monday, Jan. 26, 2009. Whistles manufactured by American Whistle are made of brass and will be used in the 43rd Super Bowl.

Anna Nelson puts whistles on an automatic assembly line for soldering at the American Whistle Corp. in Coshocton, Columbus, Ohio, U.S., on Monday, Jan. 26, 2009. Whistles manufactured by American Whistle are made of brass and will be used in the 43rd Super Bowl.

Whistles sit in rows on the table at the American Whistle Corp. in Coshocton, Columbus, Ohio, U.S., on Monday, Jan. 26, 2009. Whistles manufactured by American Whistle are made of brass and will be used in the 43rd Super Bowl.

Freshly soldered Whistles fall into a bucket at the American Whistle Corp. in Coshocton, Columbus, Ohio, U.S., on Monday, Jan. 26, 2009. Whistles manufactured by American Whistle are made of brass and will be used in the 43rd Super Bowl.

Whistles pass by on the conveyor belt before running through an automatic soldering station at the American Whistle Corp. in Coshocton, Columbus, Ohio, U.S., on Monday, Jan. 26, 2009. Whistles manufactured by American Whistle are made of brass and will be used in the 43rd Super Bowl.