The Balystik line have two female couplers that stops air immediatly when disconnecting, one located at the end of the regulator, the other one is at the end of the line, so you can disconnect your gun and keep your line under pressure, you can also disconnect the line from the regulator and keep the regulator under pressure. the connect / disconnect system is ultra fast, reliable and save air consumption. This 8mm line with cover in braided nylon is compatible with all the HPA regulators (Output thread : 1/8 NPT female).

Balystik Deluxe Remote Line for HPA Regulator (Olive Drab)
It has everything you need between the regulator to the HPA System:
An output coupler at the regulator allowing to disconnect the line with the regulator still under pressure
A 8mm line with braided nylon
An output coupler at the end of the line allowing to disconnecting the replica while the line is still under pressure
An adapter for flexible 6mm HPA
It is advised to use some resin / thread lock to install the coupler on the regulator side.