| N68 (LOOP END) | inch | mm | |
| E-1st | Clear Nylon. | .028 | 0.711 |
| B-2nd | Clear Nylon | .032 | 0.813 |
| G-3rd | Clear Nylon | .040 | 1.016 |
| D-4th | Silverplated Wound | .030 | 0.762 |
| A-5th | Silverplated Wound | .034 | 0.864 |
| E-6th | Silverplated Wound | .042 | 1.067 |
| N68B (BALL END) | inch | mm | |
| E-1st | Clear Nylon | .028 | 0.711 |
| B-2nd | Clear Nylon | .032 | 0.813 |
| G-3rd | Clear Nylon | .040 | 1.016 |
| D-4th | Silverplated Wound | .030 | 0.762 |
| A-5th | Silverplated Wound | .034 | 0.864 |
| E-6th | Silverplated Wound | .042 | 1.067 |