The Orange Butt Bee Nano-Winery, pic from yesterday, vines malbec and tempranillo, 3 years old, location = Salt lake city Trellis "wire" - 0.25" steel rod 20' lengths, threaded ends, used couplers and end bolts for tensioning. The rods were about $0.15/ft, couplers and bolts were also cheap. Threading the rods was putsy but what else am I gonna do..... I like how it turned out and it is easy to tension/detension. I do see a temperature affect on the tension.