peemovsky5 years ago+220Hello. Are "Mundstücke" one time used? Could someone explain? Do I have to buy more everytime i make a test? maGicmammut5 years ago+330No, the mouthpieces are just a simple plastic attachment. you can test with or without them and use them multiple timesCommentbubumont1 year ago000Is for one mouth ;)Show in original language (German)Comment