Need info on this tetsupin please

[Kalliekat5606]

Purchase online and was told it was to boil water not brew the tea. I received was expecting no finish on the inside. But there is a finish, so now I am not sure how to use this . Tried to take photos but said file to big?

[MuYun]

you could try to place the link to the website from where you have purchased tesubin or upload the photos to a file sharing site and share the link(s).