SodaStream CO2 Carbonator Cylinder Canister Refill Adapter Filling Charging Adaptor with Pin & W21.8-14 or CGA320 Connector
https://www.vogueparade.com/shopping/EN/100005571/1/33059208050/sodastream-co2-carbonator-cylinder-canister-refill-adapter-filling-charging-adaptor-with-pin-and-w218-14-or-cga320-connector//