Your favorite oil is in for a massive treat! With the wickless Airflow 510 tank from Kind Pen, you’ll be creating the clouds of a lifetime and vapor you didn’t before think possible. Made entirely of glass and metal, this cartridge is superior to cheaper plastic alternatives for multiple reasons including glass cartridges are easier to fil, they don’t clog or leak as much; and they heat without adding unknown materials. Plus, you can definitely take longer drags on a glass tank. This Kind Pen cartridge, in particular, is a favorite for its notable Airflow control system. By twisting the top of the cartridge, you can adjust exactly how much air you’re actually using to vape. This tank is compatible with all 510 threaded batteries--pick your favorite battery, twist on this tank, and you’re ready to go! Choose from either 0.5 or 1 mL capacity tanks according to how much oil you want to store.