I have a quick question that maybe someone can answer. I ordered 2 packs of the Boge Lr 2.0 ohm. I ordered them from different companies. My question is this, some of them have a green wire and the others have the plain metal wire. I really like the green wire as it seems to last longer and also the carto's with the green wire are much quieter. If anyone has a clue about this, please let me knw. I bought one pack from LIberty Flights and I can't remember right this minute where I bought the other pack from. Thanks in advance.