
I'm buying two of these hoses to make a 10ft and a 15ft hose from a pre-assembled 25ft 1/4" Flexzilla hose. The connections are very easy to use. , lightweight aluminum and have a good strain relief mechanism. I applied an almost imperceptible amount of silicone grease to the end of the rod so it could be easily inserted into the hose. The aluminum is hard enough and strong enough to thread easily with 1/ 4" NPT no problem. I used four wraps of teflon tape to seal the threads and tested the connections with soapy water to make sure there were no leaks. You can't expect a 1/4" hose to be able to handle a lot of airflow. (6.35mm) slightly more down, to about 4mm. This applies to all barbed hose connections.

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