| D28 series | D16 series |
| Made of welding steel / cast iron | Made of welding steel / cast iron |
| 5 precision machined working surfaces | 5 precision machined working surfaces |
| Hole diameter: 28mm | Hole diameter: 16mm |
| Grid lines: 100mm*100mm | Grid lines: 50mm*50mm |
| Hole pitch: 100mm | Hole pitch: 50mm |
| Material thickness: approx. 25mm | Material thickness: approx. 14mm |
| Side surfaces height: 200mm | Side surfaces height: 100mm |
| Be reinforced on the underneath side by ribs | Be reinforced on the underneath side by ribs |