I have fitted my entire showroom with Har.r Fr.t air fittings and they have lasted many years. Recently it has become very difficult to change hardware. I ordered a set of Plews and Edelmann connectors and WOW! I didn't realize how heavy the others had become. They are light weight and changing plugs/tools is very easy even at full pressure! They also have large openings, so you get more unrestricted airflow. I ended up buying several kits and replacing EVERY fitting in my shop. You won't regret doing the same.
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