* With polishing surface finish * Type: bearing bar pitch: 12.5, 25, 30, 40, 60mm, and 30, 40, 60mm are recommended Cross bar pitch: 50, 100mm are recommended Material: mild steel or stainless steel Surface finish: polishing * Steel grating standards: a) China: YB/ T4001-1998 b) USA: ANSI/ NAAMM (MBG531-88) c) UK: BS4592-1987 d) Australia: AS1657-1985