What are these tubes?

Associate
Joined
26 Dec 2010
Posts
260
Location
London
Hi everyone, saw this picture a little while ago and have been searching around, just wondering if these tubes are normal tubes they have been conditioned in a way that makes them straight or if they are actually hard tubing?

10351750_714537471947427_3740403598354466672_n.jpg



thanks
 
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