This NEW in the box O Scale K-Line Model #K623-2116 Union Pacific R.R. Die Cast 4-Bay ribbed hopper with ballast load measures 11-1/2″ long coupler to coupler. The road number for this car is UP 903289. This car is very heavy, and when boxed for shipment weighs almost three pounds. Runs on 031 or larger curves. New K-Line rolling stock is getting harder and harder to find. USPS shipping.