What is the fine-grained topic of the following text: Specs: • Diameter: 25mm • 6mL Eliquid Capacity Bubble Glass and 4-5ml in regular • Dual Bottom Airflow • Adjustable Airflow • Sliding Top Fill Design • Stainless Steel Construction • 2 Glass Tanks regular and bubble glass - The Freemax Mesh Pro is a phenomenal sub-ohm tank, with its 6ml capacity bubble, Sliding top fill cap and high-wattage mesh coil platform. Only return the topic.
Freemax Mesh Pro Sub-ohm Tank Specifications