![Plate, Modified 2 x 4 with Train Coupler Open for Magnet with Blue Magnet Coupling, Train - 7.5mm Cylinder (737a / x547a) : Part 737ac04 | BrickLink Plate, Modified 2 x 4 with Train Coupler Open for Magnet with Blue Magnet Coupling, Train - 7.5mm Cylinder (737a / x547a) : Part 737ac04 | BrickLink](https://img.bricklink.com/ItemImage/PN/5/737ac04.png)
Plate, Modified 2 x 4 with Train Coupler Open for Magnet with Blue Magnet Coupling, Train - 7.5mm Cylinder (737a / x547a) : Part 737ac04 | BrickLink
![electromagnetism - How do Lego train carriages couple together no matter how you place them? - Physics Stack Exchange electromagnetism - How do Lego train carriages couple together no matter how you place them? - Physics Stack Exchange](https://i.stack.imgur.com/omlZK.png)
electromagnetism - How do Lego train carriages couple together no matter how you place them? - Physics Stack Exchange
![LEGO PART 160ac02 Plate Special 2 x 4 with Train Coupler Open with Magnet Long Cylinder Blue | Rebrickable - Build with LEGO LEGO PART 160ac02 Plate Special 2 x 4 with Train Coupler Open with Magnet Long Cylinder Blue | Rebrickable - Build with LEGO](https://cdn.rebrickable.com/media/thumbs/parts/ldraw/4/753c01.png/250x250p.png)
LEGO PART 160ac02 Plate Special 2 x 4 with Train Coupler Open with Magnet Long Cylinder Blue | Rebrickable - Build with LEGO
![Train Buffer Beam with Black Train Coupling and Black Magnet Cylindrical (4022 / 2920 / 73092) : Part 4022c02 | BrickLink Train Buffer Beam with Black Train Coupling and Black Magnet Cylindrical (4022 / 2920 / 73092) : Part 4022c02 | BrickLink](https://img.bricklink.com/ItemImage/PL/4022c02.png)
Train Buffer Beam with Black Train Coupling and Black Magnet Cylindrical (4022 / 2920 / 73092) : Part 4022c02 | BrickLink
![electromagnetism - How do Lego train carriages couple together no matter how you place them? - Physics Stack Exchange electromagnetism - How do Lego train carriages couple together no matter how you place them? - Physics Stack Exchange](https://i.stack.imgur.com/9eT0L.jpg)