The file 'Spacer Of Nano Expansion Board 5mm 3D Printer Model' is (stl) file type, size is 20.9KB.
http://www.ebay.com/itm/Expansion-Board-Terminal-Adapter-DIY-Kit-For-Arduino-Nano-IO-Shield-V1-0-Blue-/191966234964?hash=item2cb2144954:g:X7sAAOSwFV9X0jL-