zhengfang hardwarindustry co.,ltd No Item Description 1 Bearing bar 25x3,25x4,30x3,30x4,30x5,32x5,40x5,50x5,.....75x10mm 2 Bear bar pitch 12.5, 15, 20, 23.85, 25, 30, 30.16, 30.3, 34.3, 35, 40,41,60mm. US standard: 1"x3/16", 1 1/4"x3/16", 1 1/2"x3/16", 1"x 1/4", 1 1/4"x 1/4", 1 1/2"x 1/4" etc. 3 Cross bar pitch 38,50,76,100,101.6mm 4 Material Q235,A36,SS304 5 Surface treatment Black, hot dipped galvanising, paint 6 Standard China: YB/T 4001.1-2007 USA: ANSI/NAAMM(MBG531-88) UK: BS4592-1987 Australia: AS1657-1985