Features 1、SPECIFICATIONS: The hose is 1500 PSI working pressure, the gauge is 3000 PSI, the thread is CGA320 for large CO2 tanks, and TR21-4 for soda cans. 2、PRESSURE GAUGE: Equipped with pressure gauge, can clearly see the air pressure range, which is convenient to control the pressure within a safe range. 3、DUAL VALVES: This adapter has dual ON Off valves, one to control CO2 from the large to the small cylinder and the other to release excess gas after filling. 4、EASY TO INSTALL: This cylinder refill adapter is compact and equipped with gaskets for easy installation, use a wrench to tighten the connector to avoid leakage. 5、EXCELLENT METAL: The adapter hose set is made of stainless steel and brass, which is rust and corrosion resistant, and will not be deformed or worn for a long time. Specification Item Type: CO2 Cylinder Refill Adapter Material: Stainless steel, brass Connector Specification: CGA320 Hose Length: 36in Package List 1 x Adapter 3 x Gaskets 1 x User Manual