The Wismec Cylin RTA Tank Atomizer, designed by JayBo, fetures an auto dripping system with a removable tank section with a unique design of desks where the air can travle up through the positive and negetive posts hitting the coil directly. Made of stainless steel, Cylin RTA apply the latest stainless steel Notch Coil(5mmx7mm) under high wattage and will give you excellent vaping experience. The removable tank section of Cylin RTA Tank is compatible with other dripping atomizers such as INDE DUO and Indestructible. You can also rebuild the coils your preference for DIY fun. The top filling system make the e-liquid refilling more quickly and there has optional mouthpieces for option.