This image shows the beta unit in HO scale.
Beta Unit - NS Cab Roof A/C UnitRPE4C  NS 714GP40-2  NS 3020SD40E_NS6305SD60_NS66179-40C  NS 8881SD70  NS 2536GP38-3  NS 5837GP38-2  NS5647Set of Etch PartsParts PrepStep 1Step 1aBarge CementStep 2Parts PrepStep 3Step 4Step 5