In original packaging item, may require some assembly. See link for more details:

Note: Carrying bag not included

https://www.vevor.com/diving-snorkeling-c_13730/vevor-mini-scuba-tank-0-5l-portable-diving-tank-for-underwater-breathing-reusable-lung-diving-cylinder-up-to-10-minutes-dive-time-emergency-rescue-pony-bottle-with-bag-and-lanyard-for-snorkeling-p_010590332402