Stainless Steel and Pyrex Glass. These use the new-style dual coils from Kanger that have the stem. Airflow control by turning the dial at the bottom. You control the draw of the device. Duail coils at 2.0 ohms total (two 4 ohm coils) for awesome vapor and flavor Removable 510 drip tip reinforced 510 connector all parts are replaceable no glue This includes the "Beauty Ring" for use with ego batteries. Capacity: 2.5ml The coil/wick/heads are replaceable in this tank. Included in the kit: Aerotank Two heads/wicks (2.0 ohms) Beauty Ring Gift Box Kanger is now putting a Security code on the boxes to verify you are getting a Genuine Kanger Product! Will only work with EGO/510 Thread batteries*