Product Features 1. Quick installation, simple and smart, save space. 2. Various forms, can meet any pneumatic piping needs. 3. After installation, the plastic pipe can still be turned freely. 4. There is a hexagonal handle hole on the inside of the PC screw, so it is very easy to install even in narrow places. 5. Because it is an oval pressure ring, it is easy to separate the tube at narrow places. 6. There is a washer or a sealant treatment at the thread. &l