Penn Central Scale Round Roof Boxcar #100104 In the early 1930s, Pennsylvania developed a new round roof style of boxcar thatallowed for a taller 10' inner height and increased overall loading volume. By the end of the decade the efficient round roof design was adopted by the AAR and utilized on other railroads. SKU: 6-81827 Dimensions: Length: 11 1/4" Gauge: O Gauge price: 79.99 year: 2014 rail line: Penn Central Minimum Radius: O31 Scale: Scale Catalog Year: 2014 Road Number: 100104 Die-cast metal sprung trucks and operating couplers Hidden uncoupling tabs Durable plastic frames with separately applied metal underframe details Opening doors Manuals Find the latest manuals in our support section. Replacement Parts Buy any replacement parts in our support section. Contact Contact a service station to fix your product