Walthers HO Scale Rail Shops Cornerstone Series174 Car Shop Kit 11-5/8 x 8-13/16 x 7-5/8" Easy-to-build plastic kit Three tracks wide Modular design allows easy expansion by combining kits Saw tooth roof with skylights 11-5/8 x 8-13/16 x 7-5/8" 29.5 x 22.4 x 19.4cm Detailed brick work authentic saw-tooth style roof with skylights Separate windows Openings in the floor for rail Roll-up doors