Rural Realism For N Scale Layouts The Cornerstone Series Van Dyke Farm Windmill kit brings a finely detailed, easy-to-build windmill kit to HO and N Scales. Each kit includes parts for two windmills plus a cement base and wood well cap. The prototypes have been in use since the 1880s and are still in use today. The kit is adjustable to four different heights so you can add unique structures to several farm or ranch scenes