Heavy-wall, borosilicate glass with fire-polished edge provides durability. May be slightly out-of-round due to O.D. variability.
| Sigma-Aldrich | |
|---|---|
| Product Category | Watch Glasses |
| Product Number | CLS998590 |
| Product Name | Pyrex®Watch Glass |
| Diameter | 90 mm (3.54 inch) |
