These are HO Code 83 Nickel Silver Rail Plastic Rail Joiners by Atlas® / / FEATURES: Designed to connect nickel silver Code 83 track / to nickel silver Code 100 track. / Precision engineered transparent white plastic construction. / / INCLUDES: (24) Transition Joiners / / SPECS: Scale: HO (1:87) / Rail Hgt: Code 83 (.083"") / kr2/27/01 / updt kr1/3/06