They are for HO scale use

Model Number: 20-3284-1

RP25 metal wheels

5966 manual turnout

Among other things they are suitable for forming double track connections with the 15° turnouts or double slip switches

MTH 20-65123 O Amtrak Premier SuperLiner Passenger Car Set (Set of 4) ProductID_12168171 They are for HO scaleHere is a MTH 20 65123 O Amtrak Premier SuperLiner Passenger Car Set (Set of 4). Durable ABS Intricately Detailed Bodies Metal Wheels and Axles Overhead Interior Lighting Diecast 4 Wheel Trucks Operating Diecast Metal Couplers Colorful, Attractive Paint Schemes End of Car Diaphragms Separate Metal Handrails Fast Angle Wheel Sets Needle Point Axles Detailed Car Interiors 1: 48 Scale Dimensions Detailed Car Undercarriage 4 Car Sets Feature (3) Coaches,