The Wotofo SERPENT SMM RTA features in special single coil design for easy building. With the large oil capacity of 4ml, you will enjoy a great vaping experience with massive clouds and pure taste. Besides, through filling from the top, the SERPENT SMM RTA is convenient for refilling. The bottom airflow design ensures a good taste and a smooth vaping experience for you. The atomizer is made from food grade stainless steel, which is good for health. 

Main Features: 
● Capacity: 4ml 
● Special single coil design for easy building
● Easy top filling
● Air holes under the coil, making great flavor taste 
● Material: stainless steel and glass 
● Thread: 510
● Diameter: 24mm