Vineyard 1x19 galvanized steel strand, 3.5mm to 5.0mm, high tensile trellis wire that keeps its tension when the rows are carrying a full crop. A trellis wire has one job and it does it for twenty years: stay tight. The load is modest but constant, and the failure mode that actually annoys growers is creep, where the wire slowly lengthens under sustained load and the fruiting wire sags into the canopy by mid season. That is why we build this as 1x19 in 1770 megapascal wire