Copper binding wire, black, 2.0 (weight 2.9kg) This is the remainder of what was used. I purchased 300m and this is the leftover. The weight of a new 300m roll is 8.6kg. Simply estimating from the weight, I think there's about 100m left. Core wire material: Copper wire Insulation outer diameter: 2.7mm Core wire diameter: 1.9mm Insulation thickness: 0.4mm Copper binding wire is used as a binding wire when fixing wires to insulators. Shipping will be in simple packaging, and I'm considering using Rakuraku Mercari Delivery.