This is a high quality 18# AWG Silicon Wire for ESC and Battery.
The thick of the wire depends on the capacity and current of your battery. (think about a water pipe).
Get the thicker one if you are not sure. For example, 12# is thicker than 14# which means the smaller number the thicker .
We will send you 20CM If you buy 2 quantity, 50CM if you buy 5 quantity, and so ... (one wire)
Suitable Shrink Tubing