U-nitt Bonsai Tree Training Wires: 250-gram Roll: 3.5mm/30ft Go to amazon.com Related posts The 9 best bonsai wire Feature250 g rollsize: 3.5 mmapprox lentgh: 30 feetcopper coated aluminum wire; dark brown in colorsofter than copper; will not damage tree Descriptionlarge 250g roll with excellent quality: for training and shaping your tree branches inconspicuously; reusable; will not damage your tree.