Two pairs of N-scale couplers. One is a McHenry MCH5001 short-shank pair, the other is a MicroTrains 1109 coupler convers kit for Atlas EMD SD-45 or Atlas ALCO RSC-2, MRC FA-1 or FA-2, or Con-Cor ALCO 636. Both sets are new in the original unopened package. Five bucks buys them both, and .95 puts them in a padded envelope and gets them to you.