The following packagings are authorized, provided the general provisions of 4.1.1 and 4.1.3 are met:

(1) Pressure receptacles: see topic "Single packagings";

(2) Steel flasks or bottles: see topic "Single packagings";

(3) Combination packagings which conform to the following requirements:

(a) Inner packagings shall comprise glass, metal or rigid plastics intended to contain liquids with a maximum net mass of 15 kg each;

(b) The inner packagings shall be packed with sufficient cushioning material to prevent breakage;

(c) Either the inner packagings or the outer packagings shall have inner liners or bags of strong leakproof and puncture-resistant material impervious to the contents and completely surrounding the contents to prevent it from escaping from the package irrespective of its position or orientation;

(d) The following outer packagings and maximum net masses are authorized:

| Outer packaging         |   Code   | Maximum *) |
+-------------------------+----------+------------+
| Drums                   |          |            |
|    steel                | 1A1, 1A2 |   400 kg   |
|    metal, other than    | 1N1, 1N2 |   400 kg   |
|      steel or aluminium |          |            |
|    plastics             | 1H1, 1H2 |   400 kg   |
|    plywood              | 1D       |   400 kg   |
|    fibre                | 1G       |   400 kg   |
+-------------------------+----------+------------+
| Boxes                   |          |            |
|    steel                | 4A       |   400 kg   |
|    metal, other than    | 4N       |   400 kg   |
|      steel or aluminium |          |            |
|    natural wood         | 4C1      |   250 kg   |
|    natural wood with    | 4C2      |   250 kg   |
|      sift-proof walls   |          |            |
|    plywood              | 4D       |   250 kg   |
|    reconstituted wood   | 4F       |   125 kg   |
|    fibreboard           | 4G       |   125 kg   |
|    expanded plastics    | 4H1      |    60 kg   |
|    solid plastics       | 4H2      |   125 kg   |
+-------------------------+----------+------------+

*) Maximum net mass