1. High Strength, Wear Resistance, Corrosion Resistance, High Density, Not Easy to Burst. 2. The Product is Sturdy and Durable and Has a Long Service Life. 3. Each Fitting Contains the Sealing Glue, No Need PTFE Tape, Easy to Use. 4. Pure Copper Surface Copper-plated Nickel, Stronger and Longer Life. 5. Easy Installation and Disassembly, Good Sealing Performance. 6. It Can be Used for The Connection of pipes and The Use of Different Pneumatic Components, and Has a Wide Range of Uses. 7. You Can Easily Insert or Pull out the Trachea Without Any Tools 8. The Clip of Connecting Air Pipe is Made of Strong Plastic Material, Which is Not Easy to Fall off After Connection Adopt Sealing Component, Keep Good Sealing, Not Easy to Leak. 9. Freely Change Pipeline Direction After Installation,Easy to Insert or Pull Trachea Manually Without Tools. 10. Tube Fittings Are Easy To Install, Flexible And Space-saving, 360-degree Rotate Freely, Release Rings Adopt Ellipse Design, Which Can Be Removed Conveniently. Product Parameter: Size:12MM OD x 1/2 inch NPT Thread Shape: Male Elbow Working Pressure:0-1.0 Mpa | 0-145 Psi Fluid Type: Air Working Temperature: 0-60 Celsius | 32~140 Fahrenheit Applicable Tube:PU / PA / PE / PVC Colour:black Material: Copper nickel plated Package Contents: 5 * PL12-N4 External thread joint