This is the upgrade tube customized for the Aspire Glass Clearomizer. The tube is made of pyrex glass material with a stainless steel cage for protection. The Pyrex interior means it's compatible with various e-liquids. The Stainless Steel cage means it's protected from drops. Each tank can hold 5ml e juice. Brand:Aspire Size:Height 36mm;Diameter 22mm Material:Pyrex glass & Stainless Steel Capacity:5ml