Product Description
Silicone backing gives a septum soft, reliable resealing, while a PTFE face keeps the sample away from the elastomer. These PTFE/silicone septa are a versatile replacement liner for open-top caps used in sample storage and needle sampling across many methods.
This listing is for Kimble catalog number 73818-20: PTFE/Silicone Septa, 20 mm, Case of 144. Each septum is a laminate of PTFE and silicone, offered in 15, 18, 20 and 24 mm sizes to fit matching open-top screw caps. Install the septum with the PTFE face toward the sample so the elastomer stays out of contact with contents. Septa are packed 144 per case for routine restocking. LIGHT LABS ships genuine DWK Life Sciences products with knowledgeable support from our Englewood, Colorado team.
Key Features
- PTFE face – Chemical barrier between sample and silicone.
- Silicone backing – Resilient resealing after puncture.
- Four sizes – Fits 15, 18, 20 and 24 mm caps.
- Replacement liners – Refit open-top caps as needed.
Specifications
| Catalog Number | 73818-20 |
| Brand | Kimble (DWK Life Sciences) |
| Description | PTFE/Silicone Septa, 20 mm |
| Sold As | Case of 144 |
| Material | PTFE/silicone laminate |
Available Options
- 73818-15 – PTFE/Silicone Septa, 15 mm, Case of 144
- 73818-18 – PTFE/Silicone Septa, 18 mm, Case of 144
- 73818-24 – PTFE/Silicone Septa, 24 mm, Case of 144
Applications
- Open-top cap vials
- Needle sampling
- Sample storage
- Environmental vials
