As a minimum, each Triple-wall box shall be marked in accordance with 49 CFR, ¶ 178.2, 178.3 and 178.503 on the exterior surface of the box. Markings shall have a minimum letter height of ½ inch.

The UN markings shall be in the upper left-hand corner, on two opposing longest sides.

Length x Width x Height; then CATN—(dash) plus last four(4) digits of catalog number and closing instructions on bottom panel per ¶ 2.9 of this specification.