Currently this pack contains:
SDE66-P, a streamlined cab unit for passenger work.
SDE66-F, a streamlined cab unit for freight work.
SDE44-F, a high-hood diesel for freight work.
SS4-SW, an old, cheaply made switcher from the 1890s.
SS44-SE, a streamlined duplex complete with an aux tender and custom coaches.
SS46-F, a large heavy freight duplex.
SS8-X, an experimental high-pressure 4-8-4 sporting the Franco-Crosti boiler design.
SS8-F, a 2-8-0 freight locomotive from 1910.
SS6-P, a 2-6-4 passenger locomotive from 1900.
SS6-P (Late), a variant of the SS6-P from 1931.
SE44-F, an electric freight locomotive from the 1960s.
NOTE: All packs for Immersive railroading work for all versions of Minecraft, regardless of what version it says it's for. This pack says it's built for 1.12.2, but would work just as well in 1.16.5.