510 threading connection;
Capacity: 4mL;
Resistance: Single coil 1.2 ohm (10~30w) / Dual coil 0.25 ohm (80~120W) / 0.5 ohm (30~80W) / Ni200 0.15 ohm;
Dual Parallel Wrapped Vertical Coils: 0.5 ohm (works with 30~80W) / 0.25 ohm: (works with 80~120W);
Coil material: Food grade stainless steel heating coil, friendly environment with huge ;
Coil option: Single coil and dual coil available, 1.2 ohm for single coil; 0.25 ohm, 0.5 ohm and NI200 0.15 ohm for dual coil;
100% Japanese organic cotton, non-poisonous, pure taste;
Advantage: Stainless steel tube izer, glass oil storage Tank, all parts detachable for easy cleaning;
Filling option: Top filling and bottom filling available, more convenient and practical to use with large capacity;
Airflow design: Large airflow design, huge by lung;
Comes with 3 dual heating wire coils: 0.15 ohm (Ni200) / 0.5 ohm / 0.25 ohm (pre-installed)

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If you find a product to be authentic, then it is not a clone. Authentic Uwell Crown Sub Ohm Tank - Golden + Transparent, Stainless Steel + Glass, 4.0mL, 0.5 Ohm / 0.15 ohm (Ni200), review, price, shipping

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