Annealed wire also known as black annealed wire, with good flexibility, is made of high quality iron wire, which is mainly used as binding wire and binding thread in construction industry. The wire type includes 20#, 21# and 22# etc., which can also be manufactured according to requirements. With its advanced oxygen-free annealing production line, Hebei LONGTENG Metal Products Co., Ltd.  can produce high quality black annealed wire of various specifications.