Tank Support Battery Support E-Juice & Nicotine The Build Bar Whether you're an experienced builder, or just starting to find your way, The Build Bar is the place for you! Share your awesome new build, see others' reviews of rebuildables, or ask questions. The Build Bar is an open space for all things building! Kit Support This category focuses on full kits that include a tank and mod. Herbal Vape Support 180 Smoke Products Mod Support A mod refers to the bottom part of the device (typically), that has the battery, electronic chips (for safety and control) and some times screen display. A mod either has a replaceable bettery, or a build in battery.