Automatic Wine Brewer 2 Stage Pressure Gauge Tr21*4 for Sodastream CO2 Mini Stainless Steel Wine Coffee Barrel Accessories $49.95/ea. FREE SHIPPING Description: Made from aluminium And duty plastic. The Premium Regulated Charger is very compact but is just large enough to house a very small regulator. 8mm Barb on disconnect, attach to your keg, and set the dispense pressure with co2 line. Thread: T21* 4 Do not use adapter. Soda T21X4 EU fits the European Standard Sodastream Used for Sodastream bottle with thread T 21* 4 Package Contents:1 x Regulated CO2 Charger 30 dys money back guarantee. Returned item must be in original condition and packaging. Buyer pays return shipping. No refunds issued unless item is returned.