Square Tubes
| No. | Material | Outer Diameter | Internal Diameter |
|---|---|---|---|
| 1 | Natural Quartz | □0.5 | |
| 2 | Synthetic Silica | □3 | |
| 3 | Natural Quartz | □0.6 | □0.24 |
| 4 | Natural Quartz | □1 | □0.5 |
| 5 | Natural Quartz | □2 | □1 |
| 6 | Synthetic Silica | □0.35 | □0.23 |
| 7 | Synthetic Silica | □0.35 | □0.25 |
| 8 | Synthetic Silica | □1 | □0.5 |
| 9 | Synthetic Silica | □1.5 | □1 |
| 10 | Synthetic Silica | □2 | □1 |
| 11 | Natural Quartz | □0.8 | φ0.14 |
| 12 | Natural Quartz | □1 | φ0.26 |
| 13 | Natural Quartz | □1 | φ0.36 |
| 14 | Natural Quartz | □1.4 | φ0.14 |
| 15 | Natural Quartz | □1.65 | φ0.32 |
| 16 | Natural Quartz | □1.7 | φ0.14 |
| 17 | Natural Quartz | □2.4 | φ1 |
| 18 | Natural Quartz | □2.5 | φ0.15 |
| 19 | Natural Quartz | □3.12 | φ0.13 |
| 20 | Borosilicate Glass | □1.035 | φ0.127 |
| 21 | Natural Quartz | △2 | △0.57 |
| 22 | Natural Quartz | △2.5 | △1 |
| 23 | Natural Quartz | φ0.9 | □0.265 |