What's in the Box: 1 x Widowmaker RTA 1 x Bubble Glass 1 x Spare Parts Bag 1 x instruction Manual 1 x Coil Lead Guide 2 x Adjustable airflow cap 2 x Triple Fused Clapton Coil Features & Specifications: 1. Dual intake airflow design (side and bottom) 2. Dual airflow regulation 3. Dual juice regulation 4. Dual coil configuring the port 5. 3 replaceable air rings to match various airflow adjustment 6. Fully removable for maintenance and cleaning 7. Simple to build on and wick 8. 510 thread connection -Size: 51mm (L) x 25mm (D) -Capacity: 5mL / 6mL(Pyrex Bubble Glass Tube) -Juice Well: 5mm deep juice well -Airflow: side and bottom airflow adjustable -Thread: 510 thread