It takes four to make a complete circle

Here is a Williams 21531 Great Nothern GP9 Dummy Diesel Locomotive

This is a Trainworx Inc 744-262712 N Scale 40' General Service GS Drop-Bottom Gondola - Ready to Run Norfolk & Western #6 (black

Plug and Play decoder for the N scale Atlas GP40-2

1 tank car painted and lettered for Deutschen Erdöl-Aktiengesellschaft / German Petroleum Oil Company

Bachmann 62308 HO GM&O GP30 Diesel Locomotive #529 ProductID_11629452 It takes four to makeThis is Bachmann 62308 HO GM&O GP30 #529. EMD GP30, Gulf, Mobile & Ohio #529. Its key features are: All wheel drive DCC ready with connection points for installation of a 6 or 8 wire harness decoder Super quiet, helical cut gears Diecast chassis Metal grab irons Blackened wheels Directional headlights RP25 wheel contours E Z Mate Mark II couplers Performs best on 18'' radius curves or greater Condition: Factory New (C 9) Operational Status: Functional