Innokin Z Force Replacement GlassInnokin Z Force Replacement Glasss in a 5ml extended capacity.The Replacement Glass is compatible with the Innokin Z Force Tank The 5ml glass is great for a heavier user to keep you refilled throughout the day or the regular user that prefers less refilling.This product offers to expand your tank capacity to 5ml. The Innokin Z Force Tank is not included