The EHPro Aqua RBA is a small rebuildable tank, but puts out vapor like the best of them! The Aqua is designed much like the Kayfun with a few differences. The Aqua is designed to house dual coils, and HAS adjustable airflow. The airflow opens wide enough to be bootable to take lung hits Although it still May be too tight for some. The tank itself is made of stainless steel, so it will not crack with certainement juices. The Aqua comes with everything you need for your first build, wick-including, wire and two drip tips. The drips have a wide bore tips so you will not get juice in your mouth When You pull hard. These tips are designed Specifically for the Aqua, and are too large for other 510 atomizers. You can use 510 drip tips on the Aqua, but it will fit loosely. The Aqua ook comes with a hybrid pin-which will allow the Origin mod and the Aqua to be combined into a hybrid, here is virtually Eliminating voltage drop. The Aqua holds about 1.8ml of liquid, biedt the flavor of a Kayfun with the vapor production of an RDA! Recommended for advanced users.