More info
| 16805 | 6 pcs. (6 elem.) ? 6x7, 8x9, 10x11, 12x13, 14x15, 16x17 |
| 16831 | 8 pcs. (8 elem.)? 6x7, 8x9, 10x11, 12x13, 14x15, 16x17, 18x19, 20x22 |
| 16833 | 12 pcs. (12elem.) ? 6x7, 8x9, 10x11, 12x13, 14x15, 16x17, 18x19, 20x22, 21x23, 24x27, 25x28, 30x32 |