Features Easy refill: Can connect the soda maker to commercial 5lb, 20lb or 50lb CO2 tanks without siphon with a CGA320 outlet valve. Stable in work: with corrosion resistance, high temperature ductility and low magnetic permeability to withstand up to 100, 212. Great material: made of stainless steel, brass and aluminum for better gas tightness when working under a pressure of 4500 psi. Ideal adjustment: also equipped with a 60 inch long hose, which allows a firm connection without leakage to largely simplify refilling. Rubber washers: By using food grade rubber material, the washing machine is safe to use and does not give off any chemical taste to carbonated water. Specification: Item Type: Soda Refill Adapter Material: stainless steel, brass, aluminum. Connector Specifications: CGA320 Package List: 1 x Soda Refill Adapter 2 x Dustproof Cover 2 x Large Washing Machine 1 x Small Washing Machine 1 x User Manual Package List 1 x Soda Refill Adapter 2 x Dustproof Cover 2 x Large Washer 1 x Small Washer 1 x User Manual