Plus 2mm longer than my standard Hornby replacement couplings OO MAGNETIC PIVOTING COUPLINGS Non-polarized Standard gap between rolling stock 5 pair to replace the screw on Hornby coupling. Note. These are not suitable for rivet on coupling type. There is no A & B end will work which ever way round you place your rolling stock / locos guaranteed mating no fuss. Condition is "New". Dispatched with Royal 2nd class Mail.