The iClear 16 is a classic C4 style atomizer made by Innokin. Note that this review is for the replaceable coil version of the iClear 16.
This atomizer utilizes a dual coil with a replaceable coil head. This atomizer is always labeled as "iClear 16" on the lower metal sleeve.
To determine if your iClear 16 electronic cigarette clearomizer is a removable coil or not, simply try to screw off the bottom metal piece that connects to the plastic tank. If the bottom unscrews (make sure to drain your e-juice first, or it'll end up all over you), then you have a removable coil iClear 16. If the bottom does not unscrew, since it's glued into place, versus threaded into place, then you have a non-removable coil iClear 16.