Kayser 10-Count CO2 Soda Chargers 8 Gram Highest Quality European Carbon Dioxide (CO2) Seltzer Chargers for making homemade Club Soda Each carton contains 10 CO2 Soda Cartridges- 8 grams of CO2 per cartridge Compatible: all current model soda siphons including iSi, Kayser, Mosa, Liss Produced in Europe's most modern facility by Austrian based company with decades of experience in this technology The carton of 10 cartridges is perfect size for locations with limited space or the occasional user- minimum shelf life of 5 years 8 Gram Highest Quality European Carbon Dioxide (CO2) Seltzer Chargers for making homemade Club Soda Compatible: all current model soda siphons including iSi, Kayser, Mosa, Liss Produced in Europe's most modern facility by Austrian based company with decades of experience in this technology The carton of 10 cartridges is perfect size for locations with limited space or the occasional user- minimum shelf life of 5 years