【connect tightly】There are tooth inside of the valve, the link can be firmly linked, it will not be easily disconnected. 【easy to connect and disconnect】Easy and quick tubing connections with no special tools required, just need a simple push. 【copper+plastic】This air control valve is made of copper and plastic, has a long service life. 【good sealing performance】This air control valve has a fine workmanship to ensure good sealing performance. 【wide applications】This air flow controller can be widely used in home improvement and industrial purpose ,it is necessary component for you to control the flow of air., Manufacturer: Hilitand