<br>Features:<br><br>Durable material:<br>Made of quality T6061 aircraft aluminum alloy, which are coated in a durable corrosion resistant plating, and are polished to a mirror finish, provide you long lasting use. <br><br>Application:<br>These an male to 5/16 efi adapter fittings can fit your stock return lines and supply lines of efi fuel filter and fuel rails, widely applicable in oil, fuel and water fluid, and bring you much convenience.<br><br>Specifications:<br>Material: T6061 aircraft aluminum alloy <br>Size: as pictures shown <br>Color: as pictures shown <br><br>Package includes:<br>2 x 5/16 to 6an fuel rail fitting adapters