Five HO scale building kits or details to include two American Model Builders Laser Kits: 725 GR Dill and Sons Salting Station and 702 Interlocking Tower plus three Walthers Cornerstone brass kits: 933-2955 support trusses for guywires and piping, -2939 platforms and stairways plus -2940 conveyor bridge and support tower as seen in the photos.