This is 2 pairs of couplers.
Quality replacement plug-in Couplers for European equipment.
The Kadee® Magne-Matic® coupler head with the swallow-tail shank to lock in the HO-scale NEM-362 draft gear pocket.
Two pair per package.
It is not recommended to use a metal coupler directly on a metal surface or in a metal draft gear box to avoid the possible electrical crossover or shorting that may cause damage.