Our Quick Connector Tube Fittings are Made of Food Grade Material. It Adopts Push to Connect Technology, Which Allows Users to Connect and Disconnect Quick and Easy Without the Need of Any Other Tools. It Fits Standard 1/4 Inch and 3/8" Inch OD Plastic RO Tubing, Copper, CPVC, PEX and PVC Pipe or Hose. Our Quick Connect Fittings Ensures an Easier Working Environment in Confined Places. Is Approved for Behind The Wall Installations, and Removes the need for hot works on site. Push-fit plastic fitting for the connection of Plastic, Copper Tube Joint Installation Can Be Reduced ByAround 40-Percent. When Compared to Traditional Fixing Methods. Applications Include RODI System,Irrigation System, Refrigerator Ice Maker Water Line kit, Coffee Machine etc. This 1/4 Tubing Fittings are Perfect for a Water Line Going to Your Fridge or Your Water Line Under Your Sink for a Filtration System.