This is standard on the portable QD air . This is a low-pressure, -diameter, not only flexible and durable, also compatible with most self-sealing QD connectors used in air flexible packaging. It is wrapped in a double nylon sheath, which does not affect flexibility, helps protect it from damage. One end of the double quick disconnect connector is a male quick disconnect connector, and the other end is a female quick disconnect connector. This allows you to quickly change the pipeline or disconnect the pipeline from the pneumatic equipment, which simplifies the process of removing the storage tank from the backpack. You can even weave the thread through the device. The maximum line pressure is 200 . After adjusting to 200 , it must be used on or storage tanks. -diameter pipeline for maximum . Colour:black :nylon Package Contents: 2 x hoses Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.