In two sizes for your dairy farm. 24’x 80′ for that large scale operation or 16′ x 60′ for medium sized farms.
Use 1/4″ Evergreen for the blower tube on the 24′ model and 1/8″ on the 16′ model. Both accept Tichy Train Group caged ladder for checking your silage.
24′ available in HO
16′ Available in HO and 1/64
12′ and 8 foot for the hobby farm coming soon.