The Eleaf GTL Pod Tank Base is best for Eleaf GTL Pod. With the base, you can change your GTL pod to a 510-thread tank, which brings wider compatibility. The GTL Pod Tank Base adopts adjustable airflow control valve for easy AFC. Brand: Eleaf Unit: 1 Set Size: 26 * 21mm Fit for: Eleaf GTL Pod / Eleaf GTL Pod Tank Package: Simple Packing Each set contain: 1pc Eleaf GTL Pod Tank Base