With the help of this flexible PCB, which can be folded and cut to length as needed, you can install a modern, compact N-scale decoder featuring a Next18 interface.
Some N or TT scale vehicles are equipped with a PluX16 interface. Simply plug the adapter board between the locomotive and the vehicle to use a decoder with a Next18 interface.
The Next18 adapter board is suitable if you digitize a very small locomotive without a digital interface want, but do not want to wire the decoder freely.
Perfect for Athearn (and others) this new 9 pin (female) 21MTC (Male) adaptor board allows 21MTC decoders to be easily added to your favorite locomotive.