Single-Track Curved Deck-Girder Bridge 4-Pack, Code 80 Track - Unitrack -- 17-5/8" 448mm Radius, 60 Degrees (green) The Kato N Scale Unitrack Single-Track Curved Deck-Girder Bridge 4-Pack makes it easy to add curved bridges to your Unitrack layout. This set includes four 15-degree curved bridge sections (the inside curve in the photo) and concrete bridge piers. Durable Unitrack features Code 80 nickel silver rail, realistic molded roadbed for setup on any surface, strudy rail joiners (Unijoiners) which provide secure connections and electrical continuity. The Single-Track Curved Deck-Girder Bridge Set is part of a wide selection of Kato N Scale Unitrack sets and sections.