4 pin connector kit for the new AR6400 and AR6400L brick (also inside the new Parkzone SU-26 Sukhoi)

Also used on a Parkzone Green-Dot-Vapor-Brick, if you've attached the female nano-jst connectors (available here on this site!)

These are the 4-pin connector that's technically for the X-port.

The term that's starting get used for these is NANO-JST. Note these are NOT a Micro-JST, as what's used on an AR6300 Receiver (and several other micro receivers), these are smaller

You get the housing and 6 pins total, since you WILL need extras to practice crimping!