North American Product Classification System (NAPCS) Canada 2017 Version 2.0
- 321 - Unwrought aluminum and aluminum alloys
- 32111 - Unwrought aluminum and aluminum alloys
- 321111 - Aluminum ingots and billets (except alloys)
- 3211111 - Aluminum ingots and billets (except alloys)
- 321112 - Aluminum alloy ingots and billets
- 3211121 - Aluminum alloy ingots and billets
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