Radium 5/16In Sae Female To 5/16In Sae Male To 5/16In Barb Tee

Adapter T-fitting for SAE quick-connect style connections.

These adapter fittings are available in a variety of configurations. They push-on and secure to most modern USA, European, Japanese, etc. fuel injection systems and are used to convert an OEM SAE Quick Connect connection

To determine the required size, simply measure the outside diameter of the male fitting as shown below.
0.3125 = 5/16"
0.375 = 3/8"
0.50 = 1/2"