You mean the "Looper tube?" Just a configuration that has a handle-loop on the tip for easier handling, and/or for use as a rope stanchion for rope-lines. Plus slots to hold the orange "X" flags.
https://www.airportsafetystore.com/t...r-tube-42#TL42
a.k.a traffic channelizer or delineator -
https://www.trafficsafetywarehouse.c...R1%2DO%2DRB16/