copper sheet copper plate copper sheet metal copper sheets pure copper copper copper for plants copper plates copper anode copper block copper metal copper blanks bronze sheet metal lingote de cobre puro pure copper sheet purcopper copper backing plate for welding pure copper anode sheet 2Qty 4" x 4",18 Gauge(1mm) Thickness Quality Pure Copper Plates. Copper metal easy to be cut and soldered. Each copper has protective sheet(blue) on both sides, which protects the surface of the copper from scratches or damaging. Great for jewelry, electrical, scratch builders, modelers, repairs, crafts,crafts, machine shops and an architectural applications. Be careful:Since the copper sheet has been cutted, the edge may be a little sharp, please take care of yourself when holding it.