The gas hose for travel stoves is a connection, as you do not need to replace the gas hose present with the stove, but rather just connect the hose valve to this connection and then use it.
The main benefit of this gas connection is that it enables the user to increase the length of the stove’s gas pipe, so that you can cook on the stove away from the gas tank and without having to dismantle and replace the pipe that comes with this stove.