Goodyear Flex-steel hoses are constructed of a single braid of high tensile wire for strength and static conductivity. The Flex-steel hardwall design virtually eliminates kinking and volumetric expansion problems commonly found in similar products. Flex-steel hoses retain their shape even after being run over. All hoses are UL listed, factory coupled and tested with the new lighter, stronger Fuel Grip coupling. All 5/8" and 3/4" hoses have 3/4" NPT male ends. 1" hoses have 1" NPT ends. All 5/8" and 3/4" hoses are available with swivels.