1. Full range in bearing bar size and mesh size 2. Largest production capability 3. Best Price 4. Reliable manufacturer ... , AS1657, JS31011.3 Grating Dimension Load Bearing Flat Bar sizeThickness≥3mm, depth ≥19mm19X3,19X5,20X3, 20X5, 25X3, 25X4, 25X4.5, 25X4 ... . The high-tec techneque and equipment guarantee high quality of gratings. Most of machine were imported from Japan, Germany,Switzerland,etc.4 ...