The Vandy Vape Berserker MTL RTA is the ultimate lung to mouth RTA. The Berserker RTA features superior flavor and incredible precision airflow control. The Berserker RTA has five different airhole sizes available ranging from 0.8 to 1.6mm diameter catering to your personal airflow preferences. The Berserker RTA features a 24mm diameter with a 2.0mL capacity and may be increased to 4.5mL using the included expansion glass tube. The Berserker RTA features a 2.0mL ULTEM tube and a 4.5mL expansion glass tube. The Berserker RTA also includes a 510 “pawn” ULTEM and Delrin drip tip for an improved mouth to lung vaping experience.