1/2" female pipe threads on one end, 3/8" male on the other
Don't let the name fool you – the Standard Capacity Gas Flex Line with 1/2" Outer Diameter from Hearth Products Controls is anything but standard. Coming in seven different lengths, this flex-line features a 1/2" flare, 3/8" inner diameter, and 1/2" female pipe threads on one end, 3/8" male on the other. Just remember to keep in mind that the different length have different ranges of suitable BTUs.