American Z Line ~ Z Scale ~ 4180 Airslide Hopper ~ 4-Pack ~ Southern SOU ~ 906013-1
AZL is including optional NO-SWAYâ„¢ 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-SWAYâ„¢ pin, the sway will be eliminated.