HURI Fuel Valve Petcock for DuroMax XP4400 XP4400E XP4400EH XP8500E Replacement parts,non original Thread size: M16 X 1.5MM (thread size about 5/8 in, thread pitch about 1/16 in) Hex cap size: 22 MM (about 7/8 in),diameter of fuel outlet pipe: M6 MM (about 15/64 in) Package include 1pc petcock + 1pc HURI pocket tape Note:you could apply for a full refund if you didn't receive HURI branded pocket tape.