High quality steel channel Steel grade: SS400B Model type: 75x40, 100x50, 50x20, 125x65, 150x75 Standard: JIS standard steel channel specification:steel channelItem: steel channelStandard: Japanese standardSteel grade: SS400BModel ... always used together with I beams.steel channel information: Product name High Quality steel channel Standard JIS standard Steel grade SS400B Model type 75x40, 100x50 ...