The Vandy Vape Berserker MTL RDA is a mouth-to-lung rebuildable dripper with a small chamber designed for flavour. This dripper has a unique airflow design with "inserts" with various sizes and shapes of air flow options so you can tailor your experience. The kit comes with both a solid 510 pin for dripping and a hollow pin for BF squonk mods. It's an 18mm diameter atomizer but the kit includes two different size beauty rings (22mm and 24mm) so it will look good on most mods. The kit includes a very handy build tool to aid you in pushing the coil down closer to the air inlet inserts.