High-quality connector: 1/4‘ - 1/4’ female thread Ø 6.5 mm - L=34.2 mm. Connector - coupling made of plastic and stainless steel (food safe) for installing replacement filters, filter housings, reverse osmosis, water filter systems with proven Quick & Easy Fittings closure technology. Also used for refrigerators in ‘side-by-side’ and other systems. Installation and use of the water filter accessories: A 1/4" water hose is simply inserted into the opening of the angle coupling and the blue safety clip, which is removed from the angle coupling beforehand, can be reattached. Once secured with the blue clip, the hose connection is secure and installation is complete. Each hose connection has 4 metal anchors and an internal seal integrated into it, which guarantee that the hose is held securely in the coupling. If you want to disconnect the hose, simply release the blue retaining clip and press the white retaining ring evenly. The hose can then be pulled out of the connection.