Replaces traditional tank fittings to eliminate the danger of spraying when connecting and disconnecting pressurized fuel from your tank end. Both the female and male components include a recessed check valve that automatically seals when separated or even if accidentally ripped apart. Female hose barb fitting works with both 3/8" and 5/16" fuel lines, male tank fitting conforms to 1/4" (6.4mm) NPT standard thread. Compatible with Ethanol-blended fuels and exceeds all OEM engine fuel flow requirements. Two-year warranty.