68.3% — Containers for compressed or liquefied gas, of iron or steel (731100)
25.1% — Inorganic oxygen compounds (281129)
6.2% — Gases, rare (280429)
0.4% — Hydrides, nitrides, azides, silicides and borides, whether or not chemically defined, other than compounds which are also carbides of heading no. 2849 (285000)