Spiral / Spiro Metal Duct for HVAC
It is a spiral duct which can is commonly used for HVAC.

The color, amount of polished lines, amount of scratches, dirt level etc. can be changed by using the Substance SBSAR file.
 
Flexible Metal Duct Texture
It is an elastic duct made of aluminium foil and some metallic rings. The crumpled texture offers the flexibility for bending. Therefore, this kind of ducts is usually used as a gas pipe.

The color of the foil and metal rings can be changed by the Substance SBSAR file.
Flexible Plastic Electrical Conduit / Duct
It is a flexible plastic conduit for housing electrical or LAN cables to tidy up the wiring.

The color, level of distortion, amount of dirt etc. can be managed through the SBSAR file.
 
Clear PVC Braided Hose Pipe
It is a PVC gas or water pipe having internal frame as the structure.

The color of the plastic and frame, amount of dirt etc. can be adjusted by using the Substance SBSAR file.