Which code corresponds to metal drums with removable heads?

• A. 3A1
• B. 1N2
• C. 1A2
• D. 1N1

Answer: (B)

In UN packaging codes for drums, the three-character code encodes container type, material/design, and a specific variation. The middle character identifies the drum type, and the letter N denotes metal drums with removable heads. The final digit differentiates the exact design variant, with 2 representing the removable-head variant. So the code 1N2 specifically corresponds to metal drums with removable heads. The other codes change either the material/design or the head configuration, so they describe different drum variants and aren’t the removable-head metal drum.