非鉄 ひてつ金属 きんぞくでしょう
hitetsukinzokudeshō

Noun
Desu Copula

Expresses probability in a polite manner ("probably…") of 非鉄金属

1. Non-ferrous metal, probably.; It will likely be a non-ferrous metal.

Polite
Presumptive
Conjecture