THIS IS A 0.25 MM DIAMETER COPPER WIRE PIECES – 10 METERS IN TOTAL. THIS WIRE IS NOT COATED BY VARNISH AND WIDELY USED TO CONNECT A PLATING OBJECT TO A CATHODE OR ANODE (NEGATIVE OR POSITIVE) POWER SUPPLY. ACCURACY OF DIAMETER IS +/0.3 MM. PLEASE DO NOT USE THIS WIRE TO PLATE PRECIOUS METALS BECAUSE IT WILL BE PLATED AS WELL. FOR THIS PURPOSE USE ONLY AN ALUMINIUM WIRE GRADED 4000+ THAT YOU CAN FIND IN SAME SECTION (“ACCESSORIES”).