Training Wire Bonsai Aluminum Roll Set Bonsai Tools 1.0~4.0 Mm Diameter 7 Rolls Bonsai Aluminum Training Wire Roll Set, sum 7 rolls including #1.0/100g, #1.5/100g, #2.0/100g, #2.5/100g, #3.0/100g, #3.5/100g, #4.0/100g Very good quality bonsai tree training wire, manufactured by the High Purity Aluminum, very smooth Black Oxide Coating surface, never hurt your tree.