Our cars are Ready-To-Run, with crown trucks and rapido couplers. They will accept MicroTrains® #1015-1 body mounted couplers (not included, use the MT screw and file the head a little). Plastic body, trucks and couplers.
MicroTrains® truck and coupler conversions:
H-21a 4-Bay Hopper - use body mount coupler #1015-1
Screw holes are cast in the car frame.