This is a paid asset, but now you can download PBR Modular Pipes Set Free.
Detail this asset from Unity Store: Original Link
PBR Modular Pipes Set v2.0 (Latest version)
A Very Detailed Low Poly set of Pipes with High-Quality PBR Textures, and 4 different color variations. PBR Pipes Set. This pack contains the following:
– 12 different segments.
– 4 PBR textures set.
READY FOR VR