Walthers HO Scale Rail Shops Cornerstone Series174 Railroad Shop Kit 17-1/8 x 8-3/4 x 8-5/8" 43.4 x 22.2 x 22cm Holds Locos up to 120' Long Modular Design - Easily Expanded Build End Wall with Optional Doors and Windows Detail Annex Interior with Overhead Crane (#933-3102, sold separately) Interior Crane Rails & Supports for Heavy-Duty Crane (#933-3150 sold separately)