N Scale - Bunk of 16 pipes - 24 inch dia. X 20 feet long -- Use on switch machine or other places.

thingiverse

This is a versatile bundle of 16 pipes that are 24 inches in diameter and 20 feet long. They can be placed on a rack on top of the switch machine's slide or used as a train load, or positioned anywhere on the layout. The bundle features a flat area on the bottom and middle back, making it easy to glue them to a rack. If you don't need this feature, consider looking at other options. When placed on a deck with a rack, you can push them back and forth to activate the DPST slide switch underneath and also throw the turnout via the control wire connected to it. The DPST switch can also reverse the polarity of the frog. For more information on the switch machine and its operation, visit this website: http://1fatgmc.com/RailRoad/3D-Printer/3D-Printer-Index.html