The absolute innovation is an outstanding inner diameter that truly deserves the term Highflow. The first three colors, Chrome, Deep Black, and Shiny Copper, offer great variety to cater to a wide range of tastes. The completely coordinated product series allows each system to shine in its own way, and there are no limits to individuality when combined with Alphacool hoses. A chromating process firmly bonds the coloring to the brass substrate, ensuring the longevity of the intense color and preventing the chrome layer from chipping off. A blue Alphacool logo on some of the connectors further highlights the uniqueness of these items. The function of this connector is: A double nipple with two 1/4 inch outer threads is particularly interesting when you want to extend connections or connect components with internal threads to a distributor or similar device.