Lionel 6-22958 Dash 9 Electrocoupler Kit two couplers included NIB SD40 SD60

Here is a pair of three rail O gauge electrocouplers from Lionel.  These are for upgrading your Command equipped Dash 9 and other diesels.  Kit works with Dash 9, SD40, and SD60 Engines. Note that some soldering may be required. Comes with instructions.

This kit also requires the locomotive have an LCRU or R2LC command control board (not included).