100 Leland (LE10 CO2) CO2 soda chargers - 8g C02 seltzer water cartridges - 10 boxes of 10
Leland's Mr. Fizz Seltzer Chargers - 8g CO2 cartridges.  Each one is weld-sealed for nearly unlimited shelf life and they advertise 99.95% pure CO2.  "Fits all selter bottles since 1965."  Proudly made in Hungary for decades!