Spare-Air Travel Pack Cylinder & Regulator Thread Protector Caps, 3-Cylinder O-Rings, O-Ring Lubricant, Instruction Sheet, Reusable Plastic Pouch Traveling with SPARE AIR? SPARE AIR Travel Pack: Keeps Unit Protected and Clean during Traveling! Transportation Security Administration (TSA) Compatible TSA Requirement: Cylinder and Regulator Must be Separated for Internal Inspection