... 100x50, 50x20, 125x65, 150x75 Standard: JIS standard U channel specification:U channelItem: U channelStandard: Japanese standardSteel grade: SS400BModel type: 75x40, ... Our main channel steel is hot rolled Japanese standard U channel. Usage: structual steel construction, automobile building, ... and visit us! Company: Tianjin Anxingda Import & Export Co., Co., Ltd Address: 15/F of Haitai building, No.6., ...