... production capability 3. Best Price 4. Reliable manufacturer 1. Comprehensive type and broadest range in dimension.1.1 Material Q235 , or ... 40, 60, 80……Pitch of cross bars(mm)38.1, 50, 50.8, 70, 75, 80, 99, ... The sizes and dimension is not limited to above.1.4 Grating type: Bearing bar: Plain type, ... U type; c. Security type (anti-theft)2.1 Normal type of Drainage/Ditch Cover Embedded installation, safe ...