HO Scale MTH HO SD70ACe Diesel Engine (Comfort Cab) w/Proto-Soundr 3.0 HO Scale MTH HO SD70ACe Diesel Engine (Comfort Cab) w/Proto-Soundr 3.0 SD70ACe Diesel Engine (Comfort Cab) w/Proto-Sound 3.0 - BNSF Cab No. 9199 HO Scale BNSF This product is compatible with all HO 2-Rail track including those systems offered by Atlas and Bachmann..