Features: 1.Material:Made of high-quality aluminum alloy material for strong strength.Black anodized for great appearance and anti-corrosion. 2.Size: The thread size of quick connect 3/8' male to 6an male fuel line fittings fit is 9/16-18UNF.The OD of long rod is 3/8 inch. 3.Parameters: (1)6an flared efi fittings have a sealing angle of 37 degrees. (2)temperature range: -65°F to 252°F. (3)working pressure: 1500 psi. 4.These quick connect 3/8" male to 6an male fuel line fittings perfectly replacement for the fuel inlet of EFI fuel filters and fuel lines. This efi fuel hose line fitting adapter is widely used in engine oil rail, ls exchange, transmission cooler, oil return line, fuel sensor, etc. .