Reason for discount: UNICOM O2Athletes Oxygen Can, 5 bottles, O2 Athlete

This is a set of 5 O2Athletes for oxygen supplementation.
These have been stored at home for over 6-7 years, and one is missing its outer packaging, so I am listing them as 訳あり (with a reason/as-is).

This listing is for the cylinders only. Accessories (silicone mask and regulator) are required for oxygen inhalation, but they are not included in this set.

Thank you for your consideration.