New/Never used (R) 20 CF Oxygen and (MC) 10 CF Acetylene Cylinders. They are DOT approved. The oxygen tank has a manufacturing date of 05/20 and the acetylene tank has a manufacturing date of 06/20 (that gives you about 9 years to have them exchanged at your local gas supplier). Cylinders are shipped empty. Free shipping. Shipping to continental US only. I do not ship to Alaska, Hawaii or Puerto Rico.