Full 55 / 60 cu ft 100% Argon welding cylinder. Filled too 2015 psi industry standard It is advised to contact your local gas supplier(s) to verify their policy on re-filling customer-owned cylinders. No Return on Full or Empty cylinders due to DOT regulations associated with the transport of the cylinders. Shipping only available to Continental US (Lower 48 States). All full cylinders are shipped via FedEx Ground with Signature Required by the person on the shipping address, at the time of delivery. Please provide a first and last name, and a physical address for shipping (no PO Boxes). Orders without a first and last name, and a physical address will automatically be canceled . Understanding date stamps Example 2020/10 This means the cylinder was tested in October of 2020 and is good for 10 years UN/ISO and DOT/TC Requirements - In the USA Gas Fillers can legally fill UN/ISO and DOT/TC Cylinders that meet the CFR Regulations -UN/ISO cylinders have the same dimensions, steel chemistry and valve compatibility as well as have a higher gas volume capacity and working pressure then DOT/TC Cylinders