The N Scale Walthers Cornerstone Central Gas and Supply kit is a great trackside business for every 1960s and later layout. Propane distribution facilities are common throughout the country, receiving bulk shipments by rail and truck. The gas is easily converted into a liquid, which is then stored in insulated, cylindrical tanks.

Commonly used for home and industrial heating, propane is also widely used as fuel for taxis, trucks and buses. This easy-to-build kit is similar to dealerships from coast to coast, and similar storage and handling facilities can be found alongside railroad shops, grain elevators and many types of industries. Nearly identical tanks are used for anhydrous ammonia storage, to model them simply shorten the two vent pipes.

Shipments arrive in LPG gas tank cars, and nearly identical cars are used for handling anhydrous ammonia fertilizer. The Central Gas and Supply kit includes the office, two storage tanks, pump houses, and smaller bottles and tanks typical of those used at rural homes. Decals for several businesses are also included.