Matchbox Lesney Kingsize K 10 Scammell Pipe Truck Pipe Section.
These are individual plastic pipe sections. They are replacements and not a reproduction. The pipes are made by hand, assembled from two pieces of cut white plastic pipe, painted grey for the regular wheels version.
As they are hand-made there will be slight variations in length (+/- 2mm) and there may be minor flaws in the paint - (I am trying to avoid that!)