I just got my first ever order from Nhaler.com (yeah), but one of the items that I ordered was the 3.5ml cartos for 510, and what I recieved was the igo carts. I do have an adaptor that would allow the use, but would really rather have the jumbo's that I had ordered. I did try to call and had to leave a message. Drew, please let me know what I need to do to get the correct carts on the way. thanks. by the way, the order did go out rather quickly, and thanks for that, as I am still trying to kick the analogs at this point. cant seem to find the right combination of flavor vapor and throat hit to kill that dirty desire to smoke rather than just vape.