So as I said in my previous post I am new to vaping and looks like I am making all the newbie mistakes grrrr. I started with an evod then I learned you need to replace the coil assembly (yes I learned this with one little pen that no longer worked back to cigs). So we ordered 10 of them thinking we wont get caught again. To find out the pieces weren't the right size. So we ordered yet another evod pen and the vendor kindly sent us 2 extra coil. I was like great now we have 2 pens. Wrong they dont fit my original pen. I am at a loss here lol. How can I be sure I am buying the right size when there is no info at all on the pen. 2 pens that look identical but have two different coils.