Blue Plastic Tracks

https://www.youtube.com/watch?v=zMcy_bMN6iQ

Does anybody know where these Plarail flatbeds with pipes originate from? I think there might've been a video on the forum about it relating to tankers but I can't remember.

ToKi 15000. First picture from the Plarail Museum:

Took me quite a while to gather up 6 of these but the most difficult part was obtaining the grey pipe that fits on them. Of course I had to get rid of the original yellow wheels and replace them with the normal gray and along with black couplings look much better imo.   In addition to releasing this in 2005 individually (see Chrisjo's post above) this was also released earlier with the EF59 train in 2001. There is a red colored one like this that came in two different sets that had multi colored pipe.