Product: Picture Mirror Frame Hanging Wire No. 3 50kg Breakweight 3m Brass 2 Rolls | ToolSmart Condition: New Weight (kg/g): 0.164 Additional Information: Brass strands braided around a single rust-resistant strand of steel, for extra strength. In certain circumstances, the rust resistant coating can crack, allowing corrosion to set in which can cause the wire to fail. • • • • •.