Buffer Service cars. Buffer cars are positioned between the tail locomotive and tanks cars as a safety precaution. These cars are in use today and can be found running the rails across the US. These cars represent former Burlington Northern Airslide hoppers with patched road numbers.

AZL is including optional NO-SWAY ™ bolster pins with each set. Due to the high amount of detail on the undercarriage, the cars may sway slightly. By replacing one bolster on each car with the NO-SWAY ™ pin, the sway will be eliminated.