MTL = MOUTH TO LUNG.
Mouth to lung devices are Designed for Vapers who are looking for a good and satisfying throat hit. The coils are generally small . Juices that best work with these devices are higher nicotine such as 16mg and 6mg. The VG and PG ratio of these juices are best suited for a mouth to lung device. High VG liquids clog up coils more rapidly, and will not work well, if at all, in these smaller units.