We have 125 CF welding cylinders for sale. Recently, they have gone under the hydro testing process and passed. The 10 year mark of 2021+* was stamped into each bottle. After testing, each tank was blasted, painted, and installed with a brand new 580 valves. If you decide to purchase 1 of our tanks then we may be able to give you your 1st fill of gas for FREE(Unless you want Helium!! HELIUM IS THE MOST EXPENSIVE GAS AT THE MOMENT AND CAN NOT BE PROVIDED FOR FREE!!). But, we can only fill them with the welding gases that correspond with the use of a 580 valve. Such As: Argon, Nitrogen, Helium(Not Free), C-25(75%Argon/25%CO2), BeerMix(Nitrogen/CO2), or any type of TriMix you might want made up. Just let us know? Each cylinder is $300.00 Cash. For more details please send us an email, text, or phone call. Thank you. I CAN ALSO LOCATED CYLINDERS FOR YOU THAT CONTAIN THE FOLLOWING GASES: OXYGEN ACETYLENE NITROGEN ARGON C25 HELIUM CO2 BEERMIX CONTACT ME FOR QUOTES