Detail the roofs of your model railroad structures! Air Duct #3001 in 1:160 (N-scale).
This airduct is supposed to be attached to some air condition (not included) or cooling unit (not included). Some pictures are showing the combination of #3001 with the cooling unit #1006.1/#1006.2.
This item is only the air duct!
More info, faq, howto on http://3ddecodetails.com/