From Takeda's statement, it's 316 stainless steel. https://www.takeda.com/ja-jp/announcements/2021/investigation-of-suspended-lots-of-covid-19-vaccine-in-japan

From Takeda's statement, it's 316 stainless steel. https://www.takeda.com/ja-jp/announcements/2021/investigation-of-suspended-lots-of-covid-19-vaccine-in-japan/ https://www.takeda.com/ja-jp/announcements/2021/investigatio...