Model Number: 933-1101

As shown the Walking Beam-Horse Head Oil Pump measures: 4-1/4 x 1-5/8 x 3 10

so you can choose to use any appropriate sized wall plug type regulated DC power supply for a smaller layout

This is Atlas 50001703 N 70-Ton Hart Ballast Car

MTH 20-66221 O Baltimore & Ohio 70 Smooth Sleeper/Diner VariantsUnitPrice_number_98.77 Model Number: 933-1101Features Durable ABS Intricately Detailed Bodies Metal Wheels and Axles Overhead Interior Lighting Diecast 4 Wheel Trucks 10 Passenger Figures In Each Coach Car 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 2 Car Sets Feature (1) Sleeper, (1) Diner Unit Measures: 38" x 2