Sub Headings of 7002
| 7002.10.10.00 | Not over 6 mm in diameter |
| 7002.10.20.00 | Other |
| 7002.20.10.00 | Of fused quartz or other fused silica |
| 7002.20.50.00 | Other |
| 7002.31.00.00 | Of fused quartz or other fused silica |
| 7002.32.00.00 | Of other glass having a linear coefficient of expansion not exceeding 5 x 10-6 per Kelvin within a temperature range of 0 ° C to 300 ° C |
| 7002.39.00. | Other |