an outer part and an inner part and a discharge gap is formed between the connection element and the outer part application_number US 24114708 A description referring to the drawings in particular fig1 schematically shows a side view of a device 1 according to the present invention for releasing breathing gas containing an outer part 2 with a mask port 3 and an inner part 4 with a flexible tube port 5 fig2 shows the device 1 according to fig1 in a longitudinal section identical components are designated by the same reference numbers as in fig1 the inner part 4 is fastened rotatably by means of a connection element 6 within the outer part 2 an annular discharge gap 7 for breathing gas is formed between the connection element 6 and the outer part 2 the inner part 4 has a cylindrical sliding surface 8 which is located within a mounting sleeve 9 having a design corresponding thereto with a stop 10 the sliding surface 8 is adjoined via webs 11 by a disk shaped guide segment 12 which is in contact with a contact surface 13 of the outer part 2 the contact surface 13 and the stop 10 limit.