1.replaceable coil. 
2.colorful painted 
3.capcity:1.5ml 
4.huge vapor
5.Working with ego&510 threaded batteries.

6.Color options: black, steel, blue, green, red, pink, purple, yellow.

7.Easy fills and changing coils

8.Low cost on changeable coils.

9.Coil resistance options: 1.8ohm, 2.2ohm