Universal connectors fit both Futaba and Hi-Tec/JR(S). Male to female. Very flexible, 12" long 22 AWG stranded wire. Black, red, white silicone rubber insulation.
Darn servos. Manufacturers are always making them juuust long enough to make you think you have enough wire to get from your controller to your servo. The truth is that in the middle of the night, one of their agents comes in and replaces your servo wires with something an inch shorter than you need.
So be ready to fight the servo-wire-shortening cartel by having a servo-extension cable ready on hand (and well hidden under your pillow). This extension cable features a universal connector that fits both Futaba and Hi-Tec/JR(S) servo.