These Pier Girders Were Designed for Use On Your HO Scale Track Layout by Atlas Model Railroad. Girders are strong main support beams used in the building of railroad bridges. FEATURES: One-piece black plastic girders. INCLUDES: Four Pier Girders REQUIRES: HO Scale Piers SPECS: Scale: HO 1:87 Size: 9" x 1-3/4" x 3/8" kr8/8/01 ir/jl