LIONEL MERRY CHRISTMAS GIRDER BRIDGE O GAUGE compatible w/ fastrack 2025050 O Gauge Add to your Christmas layout with our Merry Christmas FasTrack Girder Bridge! Features: Replaces on FasTrack 10" Straight Metal base Removable side girders allow placement on top or underneath platform *Compatible only with FasTrack PRODUCT SPECIFICATIONS: Gauge: O Gauge Dimensions: Length: 10"