1/4" X 1/2" X 50' Sweat Lineset w/1/2" Thick Insulation, Liquid Line Size: 1/4", Suction Line Size: 1/2", Refrigerant:R-410A, Connection Type:Sweat, Length: 50', Insulation Thickness: 1/2", Ul Listed To 700 PSI, Line set is seamlessly constructed of High Quality Copper, Weight:14 Lbs, Made In USA. (Alt Model #: 50-408-1/2B)