Demon Inline 4mm gold tube female connectors.(Pair)
Tube is 4.2mm hole, to fit latest lantern style male and Heavy duty 4mm males.
20mm long with solder bucket at one end for connecting wire.
The proven choice for batteries and motors
CORE RC CR008 RED Connector with 2x4mm Tubes
Demon 4mm Heavy duty 4mm male (Corally) connector (2)