By certification 
4>black anneal Wire Diameters: Similar to galvanized iron wire, from 5mm to 0.15mm (wire gauge 6# to 38#).
5>We offer two kinds of annealed wire, bright annealed and black annealed wire. Black annealed wire gets its name from its plain black color.
5>We offer two kinds of annealed wire, bright annealed and black annealed wire. Black annealed wire gets its name from its plain black color.
