INFO
When the cylinder in your E-Ox system becomes empty, you can quickly remove the regulator and move it to your spare cylinder, then take the empty one in for refilling when it's convenient. The E-Ox regulator fits all tank sizes interchangeably, so you can mix-and-match freely.
NOTE: You may order your E-Ox system shipped either pre-filled or empty. Pre-filled systems may not be shipped by air due to federal hazardous materials regulations. Customers located outside the continental U.S. (lower 48) must order their cylinders empty so they can be air-shipped.