Having a fine gauge wire is really important with HO scale and finer gauge model railways. These locomotives are small and you really don’t want the wires to be the show stoppers to finishing your models.
In the past i have used 32Awg servo wire from Hobbyking. These were very good. Very flexible and quite thin compared to the others i was using at the time. Then i ran into the really tiny European locomotives. While modding these locos, i ran into a wall with the wiring as there was absolutely no space in the loco for my 32awg wires!
Then i decided to try the Kynar single strand wire from my local Fry’s. While this wire was really thin (40awg i think), it was only a single strand. That meant that the wire was not at all flexible and broke easily. Also, it could not carry more than 500mA.
That is when i ran into these. They are 36awg multi-strand wires from ESU used for their decoders. I bought 6 colors and boy am i happy. Awesome wires !!. Quite flexible, insulation does not melt with heat and can carry up to 2Amps! I have used these wires for my other electronics projects too.I am a happy camper.