From the mfg. website:
FEATURES:
Die-cast metal sprung trucks and operating couplers
Hidden uncoupling tabs and rotating bearing caps on trucks
Die-cast metal body
Includes two intermodal containers featuring opening doors
Single and 2-Pack cars and containers available in unique, sequential numbers
PRODUCT SPECIFICATIONS
Rail Line: Greenbrier
Gauge: Standard O Scale
Brand: Lionel
Min Curve: O-31
Dimensions: Length: 16 3/8” each
Most Recent Catalog: Lionel 2007 Train Catalog Volume 2