BB0045C01PB01BlackElectric 4.5V Battery Box 6 x 11 x 3 Type I for 1-Prong Connectors with Red Dot Pattern (Set 118)
BB0045C02PB01BlackElectric 4.5V Battery Box 6 x 11 x 3 Type II for 1-Prong & 2-Prong Connectors with Red Dot Pattern
X877C01GreyElectric, Train 4.5V Automatic Pole Reverser Brick 4 x 9 with Magnet Holder with Blue Magnet Coupling, Train - 7mm Cylinder (x877 / x547b)
737AC04Bright RedPlate, Modified 2 x 4 with Train Coupler Open for Magnet with Blue Magnet Coupling, Train - 8mm Cylinder (737a / x547a)
737AC03Bright RedPlate, Modified 2 x 4 with Train Coupler Open for Magnet with Same Color Magnet Coupling, Train - 8mm Cylinder (737a / x547a)