WhatsApp:+86 15026860702 Website : http://www.hydraulic-quickcoupler.com Features: 1. Self-locking Drain Valve 2. Multi-position pneumatic shunt quick insert pneumatic joint 3. Can be used in pneumatic pipeline 4. The connection between Compressed air and nitrogen 5. Our c-joint allows the male and female to mix and match at will 6. Can adapt to a variety of connections,the size of the joint is the same 7. Can realize many kinds of transformation and even hundreds of combinations 8. There are many kinds