| 7017.10.00 | - Of fused quartz or other fused silica | |
| 7017.20.00 | - Of other glass having a linear coefficient of expansion not exceeding | |
| 7017.90.00 | - Other |
| 7017.10.00 | - Of fused quartz or other fused silica | |
| 7017.20.00 | - Of other glass having a linear coefficient of expansion not exceeding | |
| 7017.90.00 | - Other |