ISRI 200 No. 1 heavy melting steel. Wrought iron and/or steel scrap 1/4 inch and overin thickness. Individual pieces not over 60 x 24 inches (charging box size) prepared in 

a manner to insure compact charging.

ISRI 201 No. 1 heavy melting steel. 3 feet x 18 inches. Wrought iron and/or steel scrap 1/4 inch and over in thickness. Individual pieces not over 36 inches x 18 inches (charging box size) prepared in a manner to insure compact charging.

ISRI 202 No. 1 heavy melting steel. 5 feet x 18 inches. Wrought iron and/or steel scrap 1/4 inch and over in thickness. Individual pieces not over 60 inches x 18 inches (charging box size) prepared in a manner to insure compact charging.