20-452 Kato 20-452 Single Track Plate Girder Bridge 186mm GreyUnitrack Straight Plate Girder Bridge in Grey. Add a third dimension to your track layout with Kato UNITRACK Viaduct track, Build flyovers and multilevel passes with a variety of bridges and customizable pier heights! Also available in double track flavors, Kato viaduct UNITRACK is fully compatible with regular ground level track, and is both easy to set up and use! Contents 1 x Straight Plate Girder Bridge Features Rigid Track Sections Specifications