A connection of two flexible thin-walled tubes (1,6) comprising a coaxial assembly of the two tubes (1,6) the end of the tube (1) being inserted into the end of the other tube (6), wherein at least two circumferential protrusions (3,4) protruding radially outward are provided on the outer surface of the inner tube (1), the inner tube (1) further being provided with a circumferential stop (2) for abutting the end (7) of the outer tube (6), the stop (2) being formed as a semi-circular radially outward projection and the outer tube (6) being provided with a stop (8) for abutting the end of the inner tube (1), the stop (8) of the outer tube (6) being formed as a semi-circular radially inward projection adjoining a semi-circular radially outward projection.