Thanks Fred...I saw the couplers and my confusion was what length to order . Unfortunately the broken pieces were already discarded. I will give the medium a shot.

Hi,,,probably a very dumb question here ..but this last Christmas I purchased a Blackhawk HO scale set for under the tree. The grandkids loved it but they also liked derailments so much that they broke off both of  the ez mate couplers on the engine.   I can't figure out which ones I should order to repair. Thanks for any help🙂