... loop tie wire. It is durable, easy to twist, and practically unbreakable.Materials: stainless steel wire, black annealed wire, galvanized wire, PVC coated wire, cooper coated wire, etc ... wire (black annealed wire)Galvanized wireStainless steel wirePVC coated wire Diameter 21gauge -16gauge Length 3" – 24" Different Material:high-quality galvanized iron wire, black annealed iron wire, PVC-coated iron ...