Looks like the "cheapie" ERA clones. I have several of them and use them often and they offer up a fantastic vape (I have two in use as we speak).
Just have to watch the neg. pin. They tend to get loose and fall out over time. You'll know when something is wrong when your multimeter can't get a solid reading on the oHms.
Insulators are important but if you just cut a channel in them, it is safe and works just fine for squonking.
Just cut just enough to create a channel that does not go all the way down to the center pin (did the same thing with a Cyclone AFC). There is a whole thread somewhere on how to do this. I've even drilled up through the bottom (alongside) the insulator and never removed the center pin to create a channel.
