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510 Connectors: The industry-standard threaded interface that connects a tank to a mod. It consists of a threaded outer ring and a positive pin insulated from the outer threading. Manufacturing these to precise tolerances is critical for universal compatibility, reliable conductivity, and preventing e-liquid leakage onto the mod.Low-Nicotine/Zero-Nicotine Disposables: Target the growing market of users who enjoy the act of vaping and the flavor but wish to reduce or eliminate their nicotine intake. They are also popular for use in social settings where nicotine-free options are preferred.https://cbu01.alicdn.com/img/ibank/2017/531/659/4514956135_1316773483.220x220xz.jpgOpen System Empty Pods: Refillable pods designed for open system kits. They typically consist of a plastic housing, a mouthpiece, and a rubber stopper. Users fill them with their chosen e-liquid. These are the primary consumable for open systems and are often sold in multi-packs.E-Liquid Bottles: Often called "unicorn bottles," these are long, slender LDPE plastic bottles with a needle-nose tip for easy, precise refilling of tanks and pods. They are a fundamental accessory for anyone who buys e-liquid in large bottles or decants their own mixes.