These quick connects come in handy for quickly connecting to and disconnecting from connections of all kinds! This is the male side that has a black gasket that allows it to quickly connect to the female end. It has a 3/8" straight barb to hook up to 3/8" ID tubing. It has a temperature tolerance range from -40 to 180F and a vacuum pressure tolerance of 120 PSI. This male piece is used with the Female 3/8"In-line Hose Barb, item #05P01-121.