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18" Whistle-Free Low Capacity Flex Line, stainless steel, for use indoors/outdoors, staggered pitch every 2 inches to eliminate the nuisance of whistling found during normal installs; un-bagged, 3/8" OD -1/4" ID, 1/2" female pipe threads on one end and 3/8" male pipe threads on the other.
43,800 BTU Capacity
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