Product Description
Glass shops building custom flasks save time and material by starting from a consistent, unmarked blank. These round bottom flask blanks are ready for necks, joints or side-arms to be added.
This listing is for DURAN catalog number 217216872: Blank for Round Bottom Flask, narrow neck, beaded rim, unbranded with no markings, 3000 mL. Each blank is made from 3.3 expansion borosilicate glass complying with ISO 3585 and ASTM E438 Type 1, Class A, and matches the dimensional requirements of ISO 1773. They have a narrow neck with beaded rim and no branding or printing; the 10 liter size has a tooled neck. Offered in 3, 5 and 10 liter. LIGHT LABS ships genuine DWK Life Sciences products with knowledgeable support from our Englewood, Colorado team.
Key Features
- ISO 1773 dimensions – Standard round bottom geometry.
- Borosilicate 3.3 – Meets ISO 3585 and ASTM E438 Type 1, Class A.
- Unbranded – No markings, ready for your own finishing.
- Beaded rim – Narrow neck with beaded finish.
Specifications
| Catalog Number | 217216872 |
| Brand | DURAN (DWK Life Sciences) |
| Description | Blank for Round Bottom Flask, narrow neck, beaded rim, unbranded with no markings, 3000 mL |
| Sold As | Each |
| Material | Borosilicate glass 3.3 |
| Standard | ISO 3585; ASTM E438 Type 1, Class A |
| Dimensions | Per ISO 1773 |
| Neck | Narrow, beaded rim (10 L tooled) |
| Markings | None |
| Autoclavable | Yes |
Available Options
- 217217371 – Blank for Round Bottom Flask, narrow neck, beaded rim, unbranded with no markings, 5000 mL
- 217218676 – Blank for Round Bottom Flask, narrow neck, beaded rim, unbranded with no markings, 10000 mL
Applications
- Custom flask fabrication
- Scientific glassblowing
- Reaction flask repair
