WARNING: These coils for Rebuildable Atomizers (RBAs, RDAs, etc.) -- ADVANCED USER PRODUCTS NOT recommended for average users -- are of a sub-ohm resistance which your device may not support safely. Due to the increased risk when used incorrectly, extra safety precautions should be practiced when using sub-ohm coils. For mechanical mod users, please use batteries capable of 25A continuous or higher. If you're using a regulated mod, make sure both it and your batteries can handle the amperage required. Improper use can lead to injury or damage. Take extra care to check with your ohm meter, Ohm's law calculator and amperage drain in order to stay safe! If you have any further inquiries, feel free to contact us by phone or email.