Hi...servo extensions are made with bascially two gauges of wire. The bigger gauge wire carries current better with less voltage drop over a given length. What you need is dependent on what you are running for servos. If you have a small to medium plane with like one servo per lead or function then the less expensive wire will work O.K. But if you have lets say some high torque digatels on long leads then I would go with the better wire....twisted wire is supposed to be better but I'm not sure on that point. The cost ofd "regular" or "standard" wire is not that much less than "premium" wire. On those 24" wires I would go the high end wire no matter what. Don't misunderstand me on one point. The smaller gauge wire will work on any servo same for the high end wire. The main differance is how much voltage drop you will have... this will effect how well the servo works in the end.

The JR extension you refer to is a regular duty extension...the Hitec is the good one .......... more money yes but better as well.

Perhaps if you let us know what type of model your servos are going in you can get a better idea if you need to spend the extra money for the better leads. Also the type of servos and the size of the battery in the reciver end of the system.