520 TANK PLUS — For Your Boro Device & CTHULHU AIO 520 Tank Plus comes with a newly designed dome chimney. Better flavor. The Largest airflow boro style RBA on the marketDistinctive design to reduce L-shaped air flow affectSmooth and quiet vape experienceAir flow: 0.8mm, 1.0mm, 1.5mm,2.0mm,2.5mm,3.5mm, 4.5mm (without air pin)4.2ml capacity Easy Building DeckClick Here for Quick User GuideSecond batch surface treatment changed from sandblasting to polishing AIR FLOW Order Now