So contrary to another review here, I have managed to get 3 lines (1x Coax and 2x Cat6 (the flexible patch cable, not even the rigid installation cable!)) Move into this Flex tube. The success depends on the length: at 6m I even subsequently inserted a Cat6, although already Coax and Cat6 were there (but difficult). At about 10m there is just the two if one combines the three lines well, they do not intercalates intertwined and the flex pipe at the last minute good shakes both sides and as straight as possible (on the floor resting!) Holds. That took more good fifteen minutes ... Very much longer distances are not feasible without additional aids.
A star deduction because the pipe is broken at one point abruptly into two parts (almost shattered) - not even when shaking, but when shooting.
