Here's what a .6 ohm High Voltage Matrix Tank coil looks like disassembled. It's a vertical dual coil. I used to rebuild the Atlantis coils. Not sure if I'm going to do this one. For the $3.00 a coil it costs for the replacement I'll probably just keep putting new ones in. The black on the cotton is good black lol. Not anything flaking off. Just cotton discoloration.