Specification(pls tell me the specification)
| Bearing bar spacing | 30mm/40mm/50mm/60mm etc |
| Cross bar spacing | 40mm/50mm/55mm/60mm etc |
| Width | 600mm/900mm/1000mm etc |
| Length | 1000mm/2000mm/3000mm etc |
| Plate thickness | 2.5mm/3mm/4mm etc |
| Height | 25mm/30mm etc |
| Cross bar thickness | 6mm/8mm |
