© 2014 RailMaster Hobbies TCS IM Series N Scale Decoders IMD4 - For Intermountain SD40T-2, SD45T-2 and SD-45-2 $39.16 IMF4 - For Intermountain F-3A, F-3B, F-7A, F-7B and F-9B - $39.16 IMFP4 - For Intermountain FP-7A and FP-9A - $39.16 IMFTA4 - For Intermountain FT A units - $39.16 IMFTB4 - For Intermountain FT B units - $39.16