O-16.5 Scale PIVOTING MAGNETIC COUPLINGS Non-polarized complete with X6354 NEM pockets, Standard gap between rolling stock. The gap between rolling stock will be the same as standard old couplers. PLEASE note that it is required part disassembly of the coach to fit as the X6354 slot is facing towards the coach floor. There is no A & B end will work which ever way round you place your rolling stock / locos guaranteed mating no fuss.