| Main Tube （nominal size） |
Outer Diameter | Thickness | Inner Diameter |
|---|---|---|---|
| OD | t | ID | |
| 8A | 13.8 | 1.65 | 10.5 |
| 10A | 17.3 | 1.65 | 14 |
| 15A | 21.7 | 2.1(※1.65) | 17.5(※18.4) |
| 1.0S | 25.4 | 1.2 | 23 |
| 1.25S | 31.8 | 1.2 | 29.4 |
| 1.5S | 38.1 | 1.2 | 35.7 |
| 2.0S | 50.8 | 1.5 | 47.8 |
| 2.5S | 63.5 | 2.0 | 59.5 |
| 3.0S | 76.3 | 2.0 | 72.3 |
| 3.5S | 89.1 | 2.0 | 85.1 |
| 4.0S | 101.6 | 2.0 | 97.6 |
| 4.5S | 114.3 | 3.0 | 108.3 |
| 5.5S | 139.8 | 3.0 | 113.8 |
| 6.5S | 165.2 | 3.0 | 159.2 |