Rerence cable extension

GND (GND electrode cannot be attached to the bone) cannot be removed because the reference cable is short. Do you have a long reference cable?

Which product are you talking about? Link plz.

I purchased and am using the Reference cable at the following link


However, I feel inconvenience in using the cable due to its short length.

To solve this problem, I would like to have a long reference cable.

Where can I buy a long reference cable? Or do I have to make it by myself?