I got the Blu pack and tried to sell it without any luck. Now I'm glad I didn't. I thought I was the first to try this but apparently I'm not. 510 drip atomizer with short tip. Fits and works perfect. I use a 2.0 ohm wire and it drains the battery pretty fast. Greater the resistance (ohms) gives less heat but drains the battery slower. Lower the resistance for greater vapor even worse battery life.
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