Walthers Cornerstone HO Scale Big Grain Storage Bin Structure Kit Product Description Drying and storing grain are important functions of a grain elevator complex. This kit is ideal for use trackside or as part of a larger milling or trans loading compels From the Manufacturer Drying and storing grain are important functions of a grain elevator complex. With these kits, you can model the complete operation. Kit 5-1/2" 13.9cm Diameter.