UD Goblin mini RTA Tank Atomizer, is a rebuildable atomizer with tank. It features mini size, four dia 4mm deep juice channels as well as two "U" air holes and lovely colorful tubes for your choice. Packing Details: 1pc - Goblin mini RTA tank 1pc - spare glass tube and drip tip 1pc - accessory bag of screws and rubber o-rings Features: 1. Capacity: 3ml 2. 4 deep juice channels 3. Two air holes 4. Mini size, smaller than smaller 5. Size: (D)2mm x (H) (510 tip excluded): 28mm 6. 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.