UD Goliath V2 RBA Tank Atomizer - 5ml, it comes with adjustable juice flow system, and coil changed easily by closing juice channel. Drip Tip is spiral slot design. Packing Details: 1pc - Goliath V2 RBA atomizer (coil pre-built) 2pcs - Rocc Coil heads 1pc - Glass tube/ drip tip Extra red and blue 0-ring Accessory bag of screws and o-rings Features 1. Adjustable system for juice flow, easy coil change 2. Two 3.6mm air intake holes in the chamber 3. Spiral design drip tip 4. Diameter: 22mm 5. Height (510 tip excluded): 50mm 6. Diameter of chimney: 7.1mm 7. Capacity: 5ml 8 Color: Pure Tips: - Rebuildables are for experts, not average or beginner vapers with no knowledge of how to rebuild atomizers. These materials cannot safely be used by the inexperienced or those without basic knowledge of electronics. - 510 thread. Compatible with most 510/ego thread batteries.