An old acquaintance reports back impressively. In the tradition of the Protank series, being the vaporizer for newcomers and experienced steamer, the all-new Protank 4 is not just a facelift but a true evolution. Designed for a gourmet-level taste, the stainless steel and glass combination with its 22mm diameter fits a variety of popular box mods and batteries. The air, which is so important to the taste, makes the separately adjustable, dual Airflow easily available. The settings can be made both classically on the airflow control ring under the tank and on the newly developed Driptip.