... production capability c.reliable steel grating manufacturer d.best price grid 1.Comprehensive type and broadest range in dimension.1.1 ... , 34, 34.8, 35.3, 40, 60, 80……Pitch of cross bars(mm)38.1, 50, 50.8, 70, 75, 80 ... : plain type, plain I type, serrated type, serrated I type; cross bar: round type and square twisted type.