Easy and fun, make your own seltzer water at home. Highest quality CO2 8 gram chargers from the Austrian masters at an incredible price. This charger delivers a super carbonated soda water for all you beverages. The Kayser CO2 is guaranteed to give you a strong effervescence with no aftertaste. Each box contains 10 chargers. These are compatible with all brands of CO2 soda siphons (except the Soda Stream Products). Siphons sold separately. Manufacturer: Vienna, Austria. Gas Production and point of Export: Austria. Notes: Compatible with all current model soda siphons including iSi, Kayser, Mosa, Liss.