18' Low Side Gondola Car (2-per box) - USA #100501 & #100705 - GRAY - On30 Scale. The Spectrum® 18' freight cars are the perfect addition to your 2-6-2T Class 10 Trench Steam Engine. This On30 rolling stock arrives in a variety of road numbers with prototypical paint schemes and is finely detailed from the proportional brake wheel to the individual handrails. Each car features blackened machined-metal wheels, magnetically operated, body-mounted E-Z Mate® Mark II couplers, blackened-brass axles with needlepoint bearings, Celcon® trucks, and added weight for optimum tracking.