U.S. No. 1 Boilers.

U.S. No. 1 Boilers consists of onions which meet all the requirements for the U.S. No. 1 grade except for size. (See § 51.2830.) Size: The diameter of onions of this grade shall be not less than 1 inch nor more than 1 7/8 inches. (See § 51.2837.)