The authentic Vandy Vape Berserker V3 MTL RTA Vape atomizer is with dual-pole deck for single coil configuration. The Vandy Vape BSKR/Berserker V3 MTL RTA is with put-together airflow system and convenient top refilling system. The Berserker V3 MTL RTA Inner Diameter of the insert pins are 0.8mm / 1.2mm / 1.4mm / 2.0mm, supporting to change airflow without disassembling the RTA and placed directly under the coil. More info Berserker V3 MTL RTA By Vandyvape 510 threading connection Short Tube Size: 31.5 x 24mm Short Tube Capacity: 2.0ml Long Tube Size: 43.5 x 24mm Long Tube Capacity: 6.0ml Dual Post Build Deck for Single Coil Configuration Put-together Airflow System Comes with 3 MTL Drip Tips Top Filling System Easy installation and fully disassembled device for beginners Change airflow without disassembling the device Diameter: 24mm