Product Description
Pennyhead stoppers are a long-standing favorite because the flat round head is easy to grip and label, and these standard taper versions fit the ground joints found on everyday glassware. They provide a clean, reusable glass-to-glass seal that will not swell or degrade with solvents.
This listing is for Kimble catalog number 850500-2425: Hollow Glass Pennyhead Stoppers, 24/25. Made from low-extractable borosilicate glass meeting USP Type I and ASTM E438, Type I, Class A, they are solid in sizes 10/18 through 19/22 and hollow from 24/25 up. Joint sizes from 10/18 to 29/26 are available, plus a 14/10 microscale size. Add it to your LIGHT LABS order alongside the rest of your glassware and closures.
Key Features
- Pennyhead design – Flat head for easy grip and labeling
- Standard taper fit – Matches common ground joints
- Solid and hollow sizes – Solid to 19/22, hollow from 24/25
- Microscale option – 14/10 size for small-scale glassware
Specifications
| Catalog Number | 850500-2425 |
| Brand | Kimble (DWK Life Sciences) |
| Description | Hollow Glass Pennyhead Stoppers, 24/25 |
| Sold As | Each |
| Material | Borosilicate glass 3.3, low extractable |
| Glass Type | USP Type I |
| Standard | ASTM E438, Type I, Class A |
| Construction | Solid 10/18 to 19/22, hollow 24/25 and larger |
Available Options
- 850500-1018 – Hollow Glass Pennyhead Stoppers, 10/18
- 850500-1420 – Hollow Glass Pennyhead Stoppers, 14/20
- 850500-1922 – Hollow Glass Pennyhead Stoppers, 19/22
- 850500-2926 – Hollow Glass Pennyhead Stoppers, 29/26
- 850505-1410 – Hollow Glass Pennyhead Stoppers, 14/10
Applications
- Flask closures
- Microscale chemistry
- Reagent storage
- Replacement stoppers
