Features GREAT MATERIAL Made of stainless steel, brass and aluminum for better gas tightness when working under 4500 psi pressure. EASY REFILLING - Can connect the soda maker to standard 5lb, 20lb or 50lb CO2 tanks without siphon, which have a CGA320 outlet valve. Ideal Adjustment Also equipped with a 60 inch long hose that allows a firm connection without leakage to greatly simplify refilling. RUBBER WASHERS Using food grade rubber material, the washer is safe to use and does not transfer chemical taste to carbonated water. Stable at work: with corrosion resistance, high temperature ductility and low magnetic permeability to withstand up to 100℃, 212℉. Specification: Item Type:Soda Refill Adapter Material: stainless steel, brass, aluminium. Connector specifications: CGA320 Package list: 1 x soda refill adapter. 2 x dustproof cover. 2 x large washers. 1 x small washer. 1 x user manual (English language not guaranteed). Package List 1 x Soda Refill Adapter 2 x Dustproof Cover 2 x Large Washer 1 x Small Washer 1 x User Manual