Marty's Diesel Inlet & Outlet fittings - Aluminum

-4 = 1/4"
-6 = 3/8" 
-8 = 1/2"
-10 = 5/8"
-12 = 3/4" 

This fitting is a -6" Male JIC on one end and -6" Male ORB with O-ring on the other. This fitting is commonly used in our OBS e-fuel systems.