Specifications:The cylinder refill adapteris made of premium brassmaterialto ensure its durability and practicability.This easy to use filling kitwill enable you to fill your own CO2 from your largercylinder into smaller soda making cylinders, which is extremely convenient.It can be installed on large CO2 tanks with CGA320\/W21.8connector.It is safe and easy to control and also provide an inexpensive way to fill for soda at home.Item Name: Cylinder Refill AdapterMaterial: BrassType(Optional): W21.8\/CGA320Style(Optional): withoutGauge\/withGaugeFeatures: Durable, Portable, Easy to UseLength: 14cm\/5.51\
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