Qualcuno sa dove acquistare il tubo per poster a Helsinki?

Google “Piirustusputki”. Maybe add the city or town you are in. I don’t know if you need to go to some real art material shop or uf you can find it from Suomalainen kirjakauppa or Sinelli. Most likely you need to go to art shop. Tempera and Arteljee in Helsinki but most likely there is more too