https://www.yiwhipcharger.com/products/co2-chargers-8g/ 8g soda charger is made of carbon steel, the surface of the product is plated silver, containing 8 grams of food grade CO2 is used up and then discarded throw filled cylinder, food grade CO2 is colorless and odorless, is widely used in the food industry, has an excellent soda production effect.