特殊 とくしゅ取扱 とりあつかい郵便 ゆうびんであれば
tokushu toriatsukaiyūbindeareba

Noun
Da Copula

The "-eba" conditional form ("if/when…") of 特殊取扱郵便

1. If it were special handling mail; If it is special handling mail

Ba Conditional