This easy to use SodaStream Cylinder Filling Adaptor will enable you to fill your own CO2 from your larger bulk cylinder into smaller SodaStream cylinders. An easy and inexpensive way to fill your own Sodastream Cylinders at home at a fraction of the cost of getting the refills from your local store. Can be used on large co2 tanks with CGA320 connector(USA, CAN, Brazil, Colombia, Philippines...) or DIN477 / W21.8-14(right hand) Connector / JIS m22-14 Valve of CO2 Tank (KOR, JP, UK, Germany, France, Poland, Norway, Switzerland, Russia, Ukraine, South Africa, Sweden, Chile, Czech Republic, Singapore..) .