This is the JR Sport Standard 6-Inch Y-Harness. These are required to run two servos off of one receiver port. These are often used to run aileron servos.
This is the JR Sport Standard Switch Harness. These have the separate chargewire so there is no need to unplug the battery from the switch lead to charge it like with the cheaper switches.
This is the E-Flite 3" Y-Harness, Lightweight
A lightweight line of servo extension leads and a Y-harness for use with lightweight aircraft, where minimizing flying weight is important for ultimate...