NES Controller Rubber Pad Replacements
If your original Nintendo Entertainment System game controller doesn't register all key presses properly anymore, or even register double-presses, the problem might very well be caused by the rubber pads getting old and worn out.
Especially in old, original controllers, the rubber and their conductive pads tend to start not making proper contact with the copper pads on the controller's PCB after a long time. Please note that the problem might also be with the loose connections in the controller cable and/or connector, or even the PCB itself, so please make sure to check for that as well.
These replacement rubber pads are newly produced and will fit original and reproduction controllers.