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18650/21700 Batteries: Standardized, cylindrical lithium-ion cells that are removable and rechargeable. The numbers refer to their dimensions (18mm x 65mm, 21mm x 70mm). They are the power source for advanced mods, with different models offering trade-offs between capacity (mAh) and maximum discharge current (A).E-Liquid Formulations & Bottling Beyond hardware, this critical category encompasses the manufacturing of a vast spectrum of nicotine e-liquids. Services include custom flavor development, nicotine salt and freebase nicotine formulations in various strengths (e.g., 0mg, 3mg, 5mg, 50mg), professional bottling in multiple sizes (30ml, 60ml, 120ml), and custom brand labeling. This allows distributors to offer a complete, cohesive product line under their own brand, from the device to the consumable liquid.https://cbu01.alicdn.com/img/ibank/2014/578/372/1712273875_1253427170.220x220xz.jpgLimited Edition Box Mods: High-end, often hand-finished mods produced in small quantities. They may use premium materials like stabilized wood, forged carbon fiber, or engraved brass. These are collector's items that represent the pinnacle of vaping as a hobby and craftsmanship.Kanthal/Ni80/SS316 Wires: Spools of resistance wire used for coil building. Kanthal is the standard for power mode, Nichrome 80 (Ni80) heats up faster, and Stainless Steel 316L (SS316) can be used in both power and temperature control modes. Available in various gauges (thicknesses).