OO MAGNETIC PIVOTING SQUARE CHUNK COUPLINGS Non-polarized Standard gap between rolling stock  5 pair  to plug in to NEM pockets.
These are extra longer 13.5mm + 13.5mm NEM to NEM
There is no A & B end will work which any way round you place your rolling stock / locos guaranteed mating no fuss. Fully compatible with all Porterhouse MODELS Couplings.

Note for some rolling stock 
There are also standard short (9.5mm + 9.5mm NEM to NEM)
and (11.5mm + 11.5mm NEM to NEM) available.

 Condition is "New". Dispatched with Royal 2Nd class Mail.