We are offering channel. Product detail:standard: astm , bs, din, gb, jibplace of origin: chinalength: 1-12mtolerance: +-2%dimensions: 51*25*3mm-305*80*13mmapplication: constructiongrade: q235, q345 specifications carbon steel u channel 1)length: max 12m 2)grade:q235, q345 3)standard: bs, gb, jis.